Extracted the merge message as an argument to the shell script.
Added a spec for testing the shell script individually.
Started converting the shell script into a full ruby script.
Added a rake file to run all the specs. Not using the normal ruby
folder structure because the cherry_picker needs to know the exact
location of the auto_append ruby script, and the easiest way is if
they're all in the same directory.
Made the path to the shell script independent of the current working
directory. It just has to be in the same folder as the cherry_picker
Moved actual implementation to a 'lib' folder.