Issue #367 (https://github.com/DigitalCampus/oppia-mobile-android/issues/367)
Created a super-class for every text-based quiz widget that implements that funcionality
Merge pull request #381 from jjoseba/master

Issue #367 (https://github.com/DigitalCampus/oppia-mobile-android/issues...
CLOSED - task 367: In quizzes check that keyboard collapses between each
question
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/367
update about page
update link in license header
Merge remote-tracking branch 'upstream'