Merge pull request #12 from LumaPictures/master

New: FindArnold, FindILMBase, and FindNuke with some other patches
Improve FindMtoA to properly search $MTOA_ROOT env var, as well as search the maya and arnold plugin paths
Add Nuke 8.0 to the known versions
Merge pull request #13 from sebastianelsner/master

Add Nuke 8.0 to the known versions