Bump version
Merge branch 'release/0.7'
Merge tag '0.7' into develop

Changes:
 - Lots of UI problems fixed
 - Prevent a notification from appearing when we are answering questions
 - Automatic crash reporting
 - Rebuild the "Measures" activity
 - New checkpoint after the personality questionnaire
 - Version of questions is sent in with the profile
 - Incomplete addition of "StarRating" question type (they're unthemed for the moment)
 - Addition of Android 2.3.3 as a target