remove glut and clean up windows build cmake
Merge pull request #1557 from birarda/master

some more library removal
Merge branch 'windows_build' of https://github.com/ZappoMan/hifi into windows_build
remove no longer needed compiler warning disable
Merge pull request #1559 from ZappoMan/windows_build

remove glut and clean up windows build cmake
if audio is muted don't loopback local audio, fixes #1561