Removed unused translations, added missing german translations.

Also added padding to the imageviews of some layouts.
Refactoring of class FSet.
Implemented hashCode() and equals() for class FSet.

Also added new class FreeField.
Removed class TrainingSubEntry, a TrainingEntry now will have FSets instead.

Also updated the parsers and parser test to support this change.
Fixed some bugs concerning parsing/saving a Workout from/to xml.

Unfortunatelly the equals() method of Workout seems to be broken.
While:

assertEquals(mWorkout.toDebugString(), w.toDebugString());

works, :

assertEquals(mWorkout, w);

fails.
Created a dialog to add FSets to a TrainingEntry.

Also moved ShowWorkoutHTMLActivity to another package.