Changed buildtools version and target sdk version in build.gradle
Also some coding style edits(now using android studio auto format for .gradle files)
Update to gradle 1.9 and android gradle plugin 0.7
Merge pull request #840 from Catrobat/gradle_buildtootls_update

Changed buildtools version and target sdk version in build.gradle
Merge branch 'master' into DatatypeStringExperimental