tweak the oculus find module to take copied-in folders
find LibOVR depending on architecure and build type on Linux and Win
simplify the gitignore for interface externals with readme
remove extra spaces in the gitignore
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge branch 'master' of https://github.com/highfidelity/hifi
Basic joint data sending.  Closes #2166.
Merge branch 'master' of https://github.com/highfidelity/hifi into joints
pull out glew and freeglut so they can be external dependencies
Merge branch 'master' of https://github.com/highfidelity/hifi into cleanup-externals
cleanup interface CMakeLists for freeglut and GLEW finding
add a find module for glew and tweak glm module
tweak the GLEW and glut modules to be more hifi specific
look in {HIFI_LIB_DIR}/glm for glm on windows
add information to setup external libs on windows
clarifications for the root_lib_dir for windows build
clarify the glm note
Further joint bits.