FF: Avoid calling Freeze() and Thaw() on Win32
Merge pull request #643 from hsogo/master

FF: Avoid calling Freeze() and Thaw() on Win32
Add warp and frame packing to PsychoPy
Title comments
Fix comment
GPLV3 license
Merge branch 'Warp' of https://github.com/jaybo/psychopy into Warp