Added sl4j-android dependency
Merge branch 'cleanup' of github.com:Arbonaut/collect-android into cleanup
Better connection close handling
Merge branch 'cleanup' of github.com:Arbonaut/collect-android into
cleanup

Conflicts:
	android-app/src/main/java/org/openforis/collect/android/service/ServiceFactory.java
Improved database configuration
Code clean
saving backup of data as zip file
Merge branch 'cleanup' of github.com:openforis/collect-android into cleanup
Merge branch 'cleanup' of github.com:Arbonaut/collect-android into cleanup