gitignore
Fixed setPixel to wrong index in frame buffer. The index to the buffer array is integer and not float. Because of it there was bad access to the buffer and wrong pixels were set.

This issue was revealed in TEST_1 - SGL_POINTS were not at their desired places.
Fixed setPixel to wrong index in frame buffer. The index to the buffer array is integer and not float. Because of it there was bad access to the buffer and wrong pixels were set.
changed web pages
lecture instructions added
Bug fix - O2 optimalisation not working.

Never return reference to local variable!!! The reference could be still available on the memory, but obviously with O2 is not and therefore the scene could not be drawn properly.
Bug fix - the screen was not cleared.
Bug fix: weird fill of polygon.
Make rotation and translation available in our testapp
Minor refactor.
gitignore
Merge branch 'master' into SceneGraph

Conflicts:
	source/cpp/helpers/DrawingLibrary_FLAT.h
Added Point model to SceneGraph