Added JSON object containing a list of underscore fns

This object should be considered the master metadata document for underscore
functions. We'll include function descriptions, filler text for the editor's
start state, and more in here.

I'll likely want to move this into a database when I have enough data to
justify doing so. (Probably when I implement accounts.)
Updated readme
Updated attribution header
Stripped jasmine out in preparation for Mocha
Converted fully to Mocha

Mocha's flexibility makes it a better fit for this project, so I'm going with it
over Jasmine for the time being.
Modified Mocha source to exclude some unnecessary features
Renamed describes to be easier to grep
Modified body style to be more compact
Changed test grep string, added todo