DrumActivity, Drum Layout, First Drumsounds
DrumLooper implementiert
bpm in drums started
Added Buttons to DrumLayout und Drum-ContextMenu, started Load/Save DrumPreferences
Refactor DrumRow, Load/Save Preset, Load Dialog
Preset Save/Preset Load Dialog
Add Drum Sound-Spinner to each Row, Add DrumSound support to presets load and save
new drum sounds. new drum management via enum drumtype. first tests
More Tests for Drum package. Added onBackPressed-Handling (unsaved changes etc.)
merged with MusicdroidNewRecorder, fixed merge errors
handle invalid file names. some tests
input validator, testcases, drumlayout
fixed 16beat drum layout
export drums dialog, layout fixes
fixed some layout errors, added beat-position to drummixer
MIT-Changes: Add DrumLoop to SoundMixer, Play and Stop  DrumLoop in SoundMixer, Edit DrumLoop
MIT-Changes: Copy Drum-Loop, small Play-Button in Drum-SoundTrackView, Copy Mic
changes
changes