Changes:
   * added point light.
   * added court's texture.
   * change object's scale.
   * now is possible to add texture to one mesh.
   * extract CUBE mesh constants to Cube.h header file.
Merge branch 'lab1' into dev
Fix build error:
  * remove incorrect line in CMakeFile.txt
Merge branch 'master' of https://github.com/dymitr-zalunin/g3d into dev

Conflicts:
	CMakeLists.txt
Now camera can be rotated clockwise.

Fix clockwise camera rotation.
Merge branch 'lab1' into dev
Added one defective spotlight.
Merge branch 'lab1' into dev