GRIM: Verify the game data at the first startup
GRIM: Ask for confirmation before running Grim if the md5 check failed
GRIM: Fix the result returned by MD5CheckDialog
GRIM: Make the progress bar nicer
GRIM: set the result value just before closing
GRIM: Make the progress bar look good on all the themes by pretending it's a slider
Merge pull request #718 from giucam/md5

GRIM: Verify the game data at the first startup