0.9 release

1. ef20bd4 rt: Make valgrind Win64-compatible by klutzy · 12 years ago
2. d28175b Upgrade valgrind headers to 3.7, silencing build breakage on FreeBSD. by Graydon Hoare · 13 years ago
3. b513a5a Make valgrind usage more consistent and less error prone. by Austin Seipp · 14 years ago