- Added object collections ...

- Changed demo rendering to cube
- Enabled backface culling
- Fixed frame drops due to lines going offscreen
- Optimised 2d triangle rendering

Implementation of: ...

- Face normal calculation
- Vector angle calculation
- Restructuring of how faces+objects are stored

Implementation of: ...

- Matrix multiplication
- 3D projection + a fix for points behind the camera

Initial implementation ...

- Base
- Line drawing
- Polygon drawing