Many half implementations ...

- bad line drawing for easier debugging
- Z Buffers
- UV texture mapping
- Non-working perspective texture mapping
- Non-working polygon slicing.

- Fix inverse matrices (actually) ...

- Fix FOV calculation
- Fix issues with projection function
- Make projection function impossible to read
- Fix bounding sphere calculation
- Implement and enable frustum culling.

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