Android Code

Initial Android Code.  Eclipse is being difficult so it is untested
(since last week when EEG was not connecting), but it should be working
fine now.
Rebuilt app around tabbed UI

Various bug fixes

New tabbed app moddled after brain drain
to-do: Circles and trend UI, make real time UI not suck, fix checkmark
on contextual action bar, fetch data from server
Merge branch 'Android' of https://github.com/Mr-Black/engagement-tracker into server
Added some documentation to server code