Add function to update db to v3
Merge branch 'challenge' into dbv3_DateAdded
Read and set date added. TODO: Insert when reading song.
Some checks for _CurrentStream (Darkice)
Fix crash when starting vocaluxe without avatars.
Read #DUETSINGERP1 and #DUETSINGERP2 from texts for better compatibility (performous uses this tags).
Added saving number of played times of a song. ATTENTION: This is not very fast. Maybe someone has a better solution.
Forget to remove test-stuff.
Merge branch 'dbv3_DateAdded' of github.com:flokuep/Vocaluxe into release-0.3

Conflicts:
	Vocaluxe/Base/CDataBase.cs
	Vocaluxe/Base/CSettings.cs
	VocaluxeLib/Menu/SongMenu/CSong.cs
Add songs to highscore.db at start, save date to db, read date and numplayed to song-infos.
Increase NumPlayer-attribute at saving to db.
Save DatabaseSongID to CSong for (should be) faster saving of NumPlayed and Scores.
Split Notes, Lines and Voices into separate files/classes
Merge remote-tracking branch 'remotes/flokuep/release-0.3' into develop

Conflicts:
	Vocaluxe/Base/CDataBase.cs
Code cleanup
Added license stuff
Fill NumPlayed-Columns with data from scores-table during db-update.
Fix date-conversion.
First fix for wiimote (thx to Darkice). Todo: Fix Access-Violation-Bug.
Some improvements for wiimote-support (Darkice).
Undo some changes.