muzima-cordova: user management and authentication workflow added.
muzima-cordova: muzima js included, cohort list and login page update
Merge pull request #19 from nribeka/muzima-cordova#18

muzima-cordova: user management and authentication workflow added.
Merge pull request #20 from nribeka/muzima-cordova#15

muzima-cordova: muzima js included, cohort list and login page update