Don't use OpenGL typedefs for types of float, int, etc...
#17: Load models on demand 

Task-Url: http://github.com/BlackCrowned/OpGLLib/issues/issue/17
#18: Improve Callbacks class

Task-Url: http://github.com/BlackCrowned/OpGLLib/issues/issue/18
New methods: setDuration(int) : void | setDelay(int) : void
Always reverse to starting point when stopping and finishing animations
[STRG][SHIFT]+F
Merge branch 'release/0.1.1'