separating sound enabling and sound customizing (might solve the no more sound issue)
adding field 'intro' in root of SequenceDescription and validation of it
Update ignore patterns for release-signed APKs
adding intro field in sequence, and declare and populate intro layout in page
Merge branch 'develop' of https://github.com/daydreaming-experiment/app into feature/eurostar
layout improvements for page and questiosn
Merge pull request #199 from daydreaming-experiment/feature/eurostar

Feature/eurostar
Merge remote-tracking branch 'origin/develop' into develop
Merge branch 'develop' of https://github.com/daydreaming-experiment/app into feature/questionnaireButtonAndActivity