gui added v2
Merge remote-tracking branch 'origin/gui2' into compiler

Conflicts:
	InteligentnyTraktor/InteligentnyTraktor.LanguageProcessing/ExpressionBuilder.cs
	InteligentnyTraktor/InteligentnyTraktor.LanguageProcessing/Filter.cs
	InteligentnyTraktor/InteligentnyTraktor.Test/MainWindow.xaml.cs