Restored Core.csproj from master
Merge branch 'EXP-Replace_PS_by_PS++' of http://github.com/MediaPortal/MediaPortal-1 into EXP-Replace_PS_by_PS++
Add code to remove PowerScheduler++ from Installed Plugins
Merge remote-tracking branch 'remotes/origin/EXP-Replace_PS_by_PS++' into EXP-Replace_PS_by_PS++