OPEN - task 271: Short answer giving feedback on wrong answer not
working 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/271
clear some lint markers
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 277: Login/Register - merge into one activity with fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
CLOSED - task 277: Login/Register - merge into one activity with
fragments 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/277
OPEN - task 279: Use the quiz percent pass rate to determine if quiz
completed 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/279
CLOSED - task 279: Use the quiz percent pass rate to determine if quiz
completed 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/279
CLOSED - task 255: In quiz feedback popup add tick/cross 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/255
CLOSED - task 280: On course download description appears as 'null' 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/280
update version no