refactoring strings
finish gps settings: check checkbox if preference of gps data found; fix onPause() bug
Merge branch 'master' of https://github.com/SE2Prj-FAITH/FAITH-AndroidApp

Conflicts:
	src/ch/hsr/faith/android/app/activities/BaseActivity.java
	src/ch/hsr/faith/android/app/activities/LoginUserAccountActivity.java
- implement public static method in geoLocationService to get Shared Preference of GeoLocation with methods like this: GeoLocationService.getGeoLocationLatitudePreferenceName(), after calling getSharedPreferences(GeoLocationService.getPositionSharedPreference(), which gets you the Shared Preference of the geolocation. - create toast especcially in UI thread (not been shown before)