Cycles / Hair rendering:
* Enable hair rendering on the GPU.

Patch by Stuart Broadfoot, with small tweaks by me, to only enable it on sm_20 and above. 

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56600 954f8c5b-7b00-dc11-b283-0030488c597c