Merge branch 'develop' into feature/LocalAppDB
updated save method on app models and moved weighted auto rating algorithm
Update CategoryWeightedAlgo to handle the case:
"automaticRating == avgCategoryRating"
added missing comments
Merge branch 'feature/LocalAppDB' into develop
fixed early parallel database access for HomeActivity and added openReadOnly method for DataSources
Merge remote-tracking branch 'origin/develop' into feature/AppDetails

Conflicts:
	src/de/otaris/zertapps/privacychecker/AppController.java
	src/de/otaris/zertapps/privacychecker/HomeActivity.java
	src/de/otaris/zertapps/privacychecker/appDetails/RateAppOnClickListener.java
	src/de/otaris/zertapps/privacychecker/automaticRatingAlgorithm/AutomaticRatingAlgorithmFactory.java
	src/de/otaris/zertapps/privacychecker/database/dataSource/AppCompactDataSource.java
	src/de/otaris/zertapps/privacychecker/database/dataSource/AppDataSource.java
	src/de/otaris/zertapps/privacychecker/database/dataSource/AppExtendedDataSource.java
	src/de/otaris/zertapps/privacychecker/database/model/AppCompact.java