Split code into multiple modules

[joefiorini]

Currently the entire plugin is in one large file, but it would be easier to maintain and for potential contributors to wrap their heads around if it was split into many small modules. I'm currently thinking something like:

bacon.jquery.coffee	Re-export public API on `Bacon.$` namespace & monkey-patches Bacon.Observable with ajax
elements/*	One module for each element that has a value function (eg. check-box.js exports checkBoxValue)
ajax.coffee	Exports ajax functions
events.coffee	Exports jQuery event wrappers

[raimohanska]

Makes sense. Not sure if elements need to be split into separate files though.