Added Rift.  Hide the progress bar when scanning is complete
Added invisible mode.  Added status text to bottom strip to show what folders are being scanned
Changed Gameplay monitor functionality to not need an entire list of games before being able to start.  It now starts immediately and supports adding installed games while it is running in a threadsafe manner
Minor tweaks to startup
Changed InstalledGame to inherit from Game instead of being a composite
Updated InstalledGame to include a unique session Guid.  This is used for matching running processes against specific instaces