First commit, and it already seems to be working.

Sorry that I didn't make any in-progress commits, but this task was so simple that I just banged it together until it seemed to work.
More documentation

Now with comments, mostly in the form of docstrings.

Also change the names of a couple of the variables in the list comprehensions, to make them clearer.
Add a readme (markdown-ish style)
Minor tweak

Fix typo, change a lambda expression to be clearer.
Merge branch 'master' of https://github.com/Decade/coconut

Ugh. Not used to this Github thing.