First pass at gridScreen
Added time in breadcrumb
Add remembering last playback time
Fix filename extension checking
Change to scale-to-fit for covers
Display the grid right after setting up the categories
Get default covers from server
Add Setup/search row and hook up setup screen
Add search screen and row update
Add loading dialog and speed up MovieObjects
Cleanup new code
Change main function to mediaServer
Update README for Version 3.0
Clean up handling of filenames with spaces