chore: Rename the project to simply 'season'

Rename the project and repo in preparation for release.

Makefile

@@ -33,7 +33,7 @@
 # The name of your main file will also be the name of
 # the output file. Libraries don't *really* have a main
 # file, but you know what I mean.
-MAIN=meeus-season
+MAIN=season
 
 # The default target. It's important to adjust this to
 # your needs. Predefined values are:

README.md

@@ -1,24 +1,26 @@
 #### Calculate the date and time of solstices and equinoctes.
 ###### Based on "Astronomical Algorithms" by Jean Meeus.
 
-The calculated dates and times are astronomical. Note that your official calendar seasons are subject to local regulation.
+The calculated dates and times are astronomical. Your official calendar seasons are subject to local regulation.
 
-###### Usage:
-```meeus-season [spring|summer|autumn|winter] year```
+##### Usage:
+```
+season [all|spring|summer|autumn|winter] year
+```
 
-###### Installation:
+##### Installation:
 ```sh
-git clone https://github.com/4nickel/meeus-season
-cd meeus-season
-make
+$ git clone https://github.com/4nickel/season
+$ cd season
+$ make
 ```
-Find the binary in ```bin``` and copy it to your ```$PATH```:
+Find the binary in ``bin`` and copy it to your ``$PATH``:
 ```sh
-cp bin/meeus-season ~/.local/bin
+$ cp bin/season ~/.local/bin
 ```
 
-###### Examples:
+##### Examples:
 ```sh
-$ meeus-season spring 2019
+$ season spring 2019
 2019-03-20@21:57
 ````