Added the code

.gitignore

@@ -0,0 +1,11 @@
+*.pyc
+build/*
+dist/*
+*.egg-info/
+*~
+/__init__.py
+*.csv
+*.ipac
+*.fits
+*.eph
+*.txt

INSTALL

@@ -0,0 +1,132 @@
+Nov2012 TME
+
+** planetc 
+
+A Python module with C extensions for exoplanet-related tasks such as computing transit 
+light curves and radial velocity variations.
+
+All *.py and *.c source files (along with all *.h headers) are located in the planetc/ folder.
+It is possible to carry out all installation steps using the Makefile in the top level 
+directory; see below for instructions.
+
+
+** External dependencies
+
+- numpy (Python library)
+- gsl, gslcblas (C library)
+
+
+** INSTALLING THE PACKAGE
+
+1. planetc/keporb.c and planetc/ma02.c are the Python/C API wrappers for the underlying C extensions.
+These should already be present, but if they aren't, it will be necessary to construct them
+from the corresponding planetc/keporb.pyx and planetc/ma02.pyx files using cython. Also, if the *.pyx
+files get changed, you will similarly need to recompile the *.c files. The latter is important
+to note, because you must make sure you do this manually. It's not hard at all though, just a
+matter of remembering to do it, and you must have cython installed (or else you have no option
+but to rely on the *.c files that have been provided). Supposing, however, that you do have 
+cython intstalled, then you can recompile the keporb.c and ma02.c files from within the top-level
+directory by entering the following command at the shell command line:
+
+  >> make cython_files
+
+If you don't have Cython installed, and you want to install it, it's very simple. Perhaps the 
+easiest way to do this is to download the Cython package from the online Python Package Index 
+and install it on your system in one command using pip:
+
+  >> pip install --user Cython
+
+where the '--user' flag here what I use, telling Python to install the package in the default
+location under the 'user' scheme. For further options (eg --prefix=<PATHNAME> etc) see the pip
+documentation.
+
+2. Once the planetc/keporb.c and planetc/ma02.c files have been created, the distribution can be built
+with the command:
+
+  >> make build
+
+3. The distribution can then be installed using:
+
+  >> make install INSTALL_OPT='<user-input>'
+
+where <user-input> is a string containing an instruction for where the distribution is to be
+installed, using standard distutils syntax. Specifically, the above command will be 
+translated by the Makefile to carry out the following:
+
+  >> python setup.py install '<user-input>'
+
+For example, the following command:
+
+  >> make install INSTALL_OPT='--prefix=/some/user/specified/folder/'
+
+would install the package lib/ wherever the user would like using the --prefix option. For
+me personally, I prefer to use:
+
+  >> make install INSTALL_OPT='--user'
+
+to make use of the '--user' option, which is what I use for all Python packages that I 
+install manually.
+
+4. Note of course that steps 2 and 3 could be completed in one go using step 3 only, because
+it will generate the intermediate build/ folder if necessary.
+
+5. Once the package has been installed, at the command line you can run:
+
+  >> make clean
+
+which will remove the intermediate build/ folder. Of course, you could just do this yourself
+using:
+
+  >> rm -rf build
+
+
+** FURTHER NOTES ON INSTALLATION:
+
+It is possible that the setup.py script may need to be tweaked if you encounted problems
+with any of the above steps. For instance, the locations of the Python and Numpy installations
+are found by default using:
+
+>> from distutils.sysconfig import get_python_inc
+>> python_inc = get_python_inc()
+>> import numpy as np
+>> numpy_inc = np.get_include()
+
+This is designed to be portable for all systems, but may need to be adjusted if you have an 
+unusual setup. Also, it is assumed that the gsl and gslcblas libraries are installed on the 
+$CPATH and $LIBRARY_PATH, respectively, so that they will be located during the compilation. 
+If this is not the case by default on your system, you will need to append the either the 
+$PATH or $CPATH variable appropriately.
+
+
+** RE-PACKAGING FOR RE-DISTRIBUTION:
+
+If you would like to edit any of the source files and repackage planetc for redistribution, then
+the following easy steps can be taken.
+
+1. Edit any of the source files in the planetc/ folder however you would like.
+
+2. Edit the MANIFEST.in file appropriately to make sure that all of the files you want will be
+bundled into the distribution archive. Currently, this is achieved by including a single line
+
+"graft planetc/"
+
+to tell setup.py to include all of the files (*.py, *.pyx, *.c, *.h etc) in the planetc folder when
+generating the distribution. Note that the MANIFEST.in file is the one that you edit to tell 
+setup.py what to do, but the MANIFEST (without the *.in suffix) is part of the output generated
+by setup.py, which you don't need to touch.
+
+3. Change back into the top level directory and make any necessary changes to the setup.py file.
+If you've just edited files that already existed, this step should be pretty minimal if it is 
+required at all. Otherwise, if you've added new files, you'll have to make sure the setup.py 
+file reflects this update. One important change to make, however, is updating the **version**
+variable in the setup() call. The convention is planetc-X.Y, where relatively minor changes 
+result in increasing the value of Y by 1, and substantial changes result in increasing the value
+of X by 1 and resetting Y to 0.
+
+4. Staying in the top level directory, at the shell command line enter:
+
+  >> python setup.py sdist
+
+This will generate a subfolder dist/ that contains the planetc
+
+

MANIFEST.in

@@ -0,0 +1 @@
+graft planetc

Makefile

@@ -0,0 +1,21 @@
+
+
+INSTALL_OPT = '--prefix=.'
+
+
+.PHONY: install build cython_files clean
+
+install:
+	python setup.py install ${INSTALL_OPT}
+
+build:
+	python setup.py build
+
+cython_files: 
+	rm planetc/keporb.c
+	rm planetc/ma02.c
+	cython planetc/keporb.pyx
+	cython planetc/ma02.pyx
+
+clean:
+	rm -rf build/

README.md

@@ -0,0 +1,17 @@
+planetc
+=======
+
+This module contains code for implementing the analytic Mandel & Agol (2002) equations
+for planetary transit lightcurves. Uses a C backend with Python/Cython wrappers.
+
+The C backend of planetc was originally based on the one written by Neale Gibson, as part
+of his "MyFunctions" package. There has been a fairly substantial reformatting of those 
+original C backends for the ones contained in planetc, but the content remains essentially 
+the same. On the other hand, the Python routines that perform calls to the C backend routines
+have been modified significantly, and the Python/C API wrappers have been completely rewritten 
+with the nicer Cython syntax. Tests confirm that the output from planetc exactly matches the
+output from the original MyFunctions routines, with identical computation time.
+
+See INSTALL for instructions on how to install the package. Once the package
+has been installed, you can cd into the examples folder that comes with this
+distribution to check out some basic usage of the planetc routines.

planetc/cephes_names.h

@@ -0,0 +1,98 @@
+#ifndef CEPHES_NAMES_H
+#define CEPHES_NAMES_H
+
+#define airy cephes_airy
+#define bdtrc cephes_bdtrc
+#define bdtr cephes_bdtr
+#define bdtri cephes_bdtri
+#define beta cephes_beta
+#define lbeta cephes_lbeta
+#define btdtr cephes_btdtr
+#define cbrt cephes_cbrt
+#define chdtrc cephes_chdtrc
+#define chdtr cephes_chdtr
+#define chdtri cephes_chdtri
+#define dawsn cephes_dawsn
+#define ellie cephes_ellie
+#define ellik cephes_ellik
+#define ellpe cephes_ellpe
+#define ellpj cephes_ellpj
+#define ellpk cephes_ellpk
+#define exp10 cephes_exp10
+#define exp1m cephes_exp1m
+#define exp2 cephes_exp2
+#define expn cephes_expn
+#define fabs cephes_fabs
+#define fdtrc cephes_fdtrc
+#define fdtr cephes_fdtr
+#define fdtri cephes_fdtri
+#define fresnl cephes_fresnl
+#define Gamma cephes_Gamma
+#define lgam cephes_lgam
+#define gdtr cephes_gdtr
+#define gdtrc cephes_gdtrc
+#define gdtri cephes_gdtri
+#define hyp2f1 cephes_hyp2f1
+#define hyperg cephes_hyperg
+#define hyp2f0 cephes_hyp2f0
+#define onef2 cephes_onef2
+#define threef0 cephes_threef0
+#define i0 cephes_i0
+#define i0e cephes_i0e
+#define i1 cephes_i1
+#define i1e cephes_i1e
+#define igamc cephes_igamc
+#define igam cephes_igam
+#define igami cephes_igami
+#define incbet cephes_incbet
+#define incbi cephes_incbi
+#define iv cephes_iv
+#define j0 cephes_j0
+#define y0 cephes_y0
+#define j1 cephes_j1
+#define y1 cephes_y1
+#define jn cephes_jn
+#define jv cephes_jv
+#define k0 cephes_k0
+#define k0e cephes_k0e
+#define k1 cephes_k1
+#define k1e cephes_k1e
+#define kn cephes_kn
+#define nbdtrc cephes_nbdtrc
+#define nbdtr cephes_nbdtr
+#define nbdtri cephes_nbdtri
+#define ndtr cephes_ndtr
+#define erfc cephes_erfc
+#define erf cephes_erf
+#define ndtri cephes_ndtri
+#define pdtrc cephes_pdtrc
+#define pdtr cephes_pdtr
+#define pdtri cephes_pdtri
+#define psi cephes_psi
+#define rgamma cephes_rgamma
+#define round cephes_round
+#define shichi cephes_shichi
+#define sici cephes_sici
+#define radian cephes_radian
+#define sindg cephes_sindg
+#define cosdg cephes_cosdg
+#define sincos cephes_sincos
+#define spence cephes_spence
+#define stdtr cephes_stdtr
+#define stdtri cephes_stdtri
+#define struve cephes_struve
+#define yv cephes_yv
+#define tandg cephes_tandg
+#define cotdg cephes_cotdg
+#define log1p cephes_log1p
+#define expm1 cephes_expm1
+#define cosm1 cephes_cosm1
+#define yn cephes_yn
+#define zeta cephes_zeta
+#define zetac cephes_zetac
+#define smirnov cephes_smirnov
+#define smirnovi cephes_smirnovi
+#define kolmogorov cephes_kolmogorov
+#define kolmogi cephes_kolmogi
+
+#endif