Import Valgrind suppression rules from GNOME.supp.

Built from:
https://github.com/dtrebbien/GNOME.supp
d12f8759856462e0b92596a33ceb82878266403f
Add script to run HoverRace w/ Valgrind.
Use custom Valgrind suppressions.
Merge branch 'valgrind'

Conflicts:
	.gitignore
Merge branch 'master' of github.com:HoverRace/HoverRace