Cycles / SSS:
* Remove the compatible falloff SSS implementation. We shouldn't support two implementations in the long term, and 2.7x is a good release number do break some compatibility as well. 

* Version patch added, so Files with Compatible falloff will automatically use Cubic now. 

It was already mentioned in the manual, that Compatible is deprecated. 
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#BSSRDF

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60615 954f8c5b-7b00-dc11-b283-0030488c597c