Merge pull request #5 from filipwasil/master

Light entity follower improved. Time dependency improved.
Camera class interface update
Merge branch 'master' of https://github.com/sabus/OpenGLES_Engine
headers added
Merge branch 'master' of https://github.com/sabus/OpenGLES_Engine
CMake script update
New types of Job instroduced and used -> Rotate Job. Update camera in world class corrected
Corrections in Entity class added
Merge branch 'master' of https://github.com/sabus/OpenGLES_Engine
missing files added
Rotation job improved