First pass at automated multi-browser/device testing. closes #419

I've got a way to run tests across every browser and device out there except for IE8, and IE8 should work except I'm running into a Browserstack bug that I've let them know about.

It uses a project called bunyip, which internally uses Yeti (YUI), Pagekite, and Browserstack.

Next steps include:
  - Making it all automatic. Right now you have to wait for browsers to connect and then manually hit enter when they have.
  - Make it a grunt task
  - Document it all so others can use it

I think this is close enough for me to close the milestone 4.0 issue.