added build dependencies
fixed party mode song selection
update to build 0075
roadmap update
fixed search handling
fixed import of usdx 1.1 highscores (if the contain date NULL)
fixed searching (one more time)
fixed num round table visible
renamed SumSingPoints to NumSingPoints, fixed player position calculation (considering sing points)
moved PartyModeChallenge to new sub dir PartyModes
Added tic-tac-toe-party-mode. Still something to do (joker, lang, winning)
Merge remote-tracking branch 'remotes/Upstream/develop' into tic-tac-toe

Conflicts:
	Vocaluxe.sln
Added functions to joker-buttons.
added party challenge medley mode
added GetPlaylistNames() method to the base class
added missing change
Added winner-detection.
Merge branch 'develop' of github.com:Vocaluxe/Vocaluxe into tic-tac-toe

Conflicts:
	Vocaluxe.sln
Remove some debug-stuff.
Some theme-improvements.