add quaternion spherical linear interpolation: quatf_slerp_new()
add quatd_slerp_new() to match previously committed quatf_slerp_new()
add more quaternion funcions, fix typo in quaternion slerp functions
fix additional problems in quaternion slerp functions
Fixed Doxy Build for CLion IDE
Merge branch 'master' of github.com:btaidm/opengl-examples

Conflicts:
	.gitignore