Tutorial Number 004

This version is the finished framework after the tutorial number 004.
The Engine is now capable of rendering arbitrary models consisting of triangles.

Tutorial Number 003

This version is the finished framework after the tutorial number 003.
The Engine is now capable of creating a new window and coloring it.

Tutorial Number 002

This version is the finished framework after the tutorial number 002.

Tutorial Number 001

This commit is the last commit before rendering the tutorial video number 001.