Creating the ViewModels for the TimeLine and the TimeLineItems.

The TimeLine ViewModel is essentially the entire business logic behind the form. It will interact with the SF4Record[<- SF4Control] and route all commands and events to the form through binding.
Renamed image files to be consistent in the View Project
Model contains TPLibrary - no need to have a separate project for Input
Some style clean up in the Main Form and removing the old references to ObserableObject and RelayCommand - the folder has been renamed to PropertyObjects from Interface Objects (it was too broad to call interfaces)
Merge branch 'Separated_View_and_Model' of https://github.com/thopiddock/SF4ComboTrainer into Separated_View_and_Model