Added tab page and tests, and added protocol to be used by view controllers in drawer.
Added documentation for drawer protocol.
Fixed some small issues.
Enabled menu button on root page, and renamed menuBar to navigationBar.
Changed open gesture to screen edge pan gesture.
Improved test coverage for tab and navigator.
Removed unused commented out code.
Fixed some tab issues.
Added some minor tests for navigator and tab.
Merge pull request #65 from reachlocal/tab

Tab