change recording format to aac with extension m4a
- refactored SoundRecorderTest: now waits for view change
- bugfix for startSensorListener, redundant calls caused runtime exception
- converted standard project audio files to aac
- important fix for testIfBrickParts Test. Eliminated Timing problems
Merge pull request #958 from Catrobat/823_Missing_MP3_Headers_New

fixes #823 missing mp3 headers
ecoding and decoding special chars in projectnames for issue #769 and #888
Merge pull request #943 from Catrobat/specialCharInProjectNameIssue#769

Special char in project name issue#769
Merge branch 'master' into drone2

Conflicts:
	catroid/src/org/catrobat/catroid/stage/StageActivity.java
	catroid/src/org/catrobat/catroid/ui/ProgramMenuActivity.java
	catroid/src/org/catrobat/catroid/ui/ProjectActivity.java
	catroid/src/org/catrobat/catroid/ui/ScriptActivity.java