Remove hack for nvidia on osx.
Altered the deferred alpha fragment shader to handle alphamasking when drawing avatar hair/skirts. (Special handling for these two seems weird, considering all other mesh parts are also alphamasked.. It also prevents skirts from casting shadows. Future alteration may be desired.)
Kill a tiny bit of dead code.
Merge branch 'master' of git://github.com/Shyotl/SingularityViewer