Improve the login detection.
Merge branch 'master' of https://github.com/englishtown/CalabashMobileProject
Merge branch 'master' of https://github.com/englishtown/CalabashMobileProject
Merge remote-tracking branch 'origin/androidStory'
Added missing methods to Android dashboard page.

Methods available_courses and change_course required by MOBILE-608, SPINS functionality.
Also fixed current_unit_title.
Merge remote-tracking branch 'origin/master' into androidStory