Basic support for shadows on models.
Missed a few files.
Merge branch 'master' of https://github.com/highfidelity/hifi
Fixed a couple copy and paste errors.
Remove unused variable.
Merge branch 'master' of https://github.com/highfidelity/hifi
fix credit amount in window title
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge pull request #2921 from ey6es/master

Support for shadows falling on models (including self-shadowing).
remove an unneeded debug
Merge pull request #2922 from birarda/master

fix credit amount in window title