moved space datatemplate into it's own file
moved space dragging logic into seperate control
added beginning of refactoring dragging descriptions
renamed audio canvas to a general itemcanvas
made general item control that space and description control inherit
put description dragging logic in seperate file
minor refactoring
refactoring spacecontrol
got rid of potential exception in MillisecondsTimeConverterFormatter
improved dragging of the description
got rid of uneeded dependency property in ItemControl
improved space dragging slightly
removed uneeded dependency property
Merge branch 'master' of github.com:IMDC/LiveDescribe-Desktop

Conflicts:
	LiveDescribe/LiveDescribe/LiveDescribe.csproj
	LiveDescribe/LiveDescribe/View/MainWindow.xaml.cs