Enumerate file hierarchy for game files.
Add ReactiveUI for presentation.
flesh out IffDump to extract image info
Add BlorbReader to library, can extract embedded cover images.
Clean up some helper classes (move to separate files)
Oops!  Use GameViewModel, not Game in MainViewModel!
Also, skip sounds (AIFF) when reading Blorbs.
update image display, better performance by using DecodePixelWidth/Height.
UI tweaks, collapse whitespace in game description.
Removed unused IDataService.GetData() API.
Updated UI to use Windows Explorer-esque sortable columns.
Context menu for game list.
"Play" button now executes game.
A few additional UI tweaks.