0.0.6-1 "Fitch"

This is the first major non-beta version.

changes since 0.0.5

now define time zero point manually (time zero is the moment when the direct wave begins to pass the receiver. previously, i used an unreliable calculation using header values to determine the time zero point)
- in the future, i will add a signal processing algorithm to detect the time zero point automatically
added bandpass filter (requires obspy)
significantly optimized background removal and dewow algorithms
added example code and plots
fixed a bug that caused both plots of dual-channel radar files to be written out to one file
fixed a bug that caused manually-created output file names to be ignored when plotting
added basic background removal and dewow capability (#5 from @fxsimon)
added support for the D50800/D50300 antenna
- added plotting support for dual-channel radar devices
- merged #3 from @fxsimon which fixed a bug that caused multi-channel file traces to be read in a 121212 sequence instead of 111222
updated the workings of the plotting algorithm's colormap
changed the way files are saved (bug in 0.0.5 mangled some filenames)
added the ability to specify colormap and whether to draw a colorbar and a histogram
added an automatic figsize option (leaves figsize up to Matplotlib)
added ability to apply gain
fixed bug that caused gain to be applied incorrectly
script now tries to automatically calculate timezero using (nsamp*range)/position

translation to anything but csv is broken (hope to have time to at least fix HDF5 output soon)
- csv translation does not work for dual-channel radar devices (exports to file but channels are merged end-to-end)
color bar shows up too large on some plots (no known fix yet)
dewow doesn't work on all files
histogram only shows pre-gain data distribution