General
- Add textures
    ? Try to implement it without external libraries
    - Make a PNG image reader

Obj
- Load obj files
    * Vertex coordinates, normals and textures
    * read faces with more than 4 vertices
    - Read object materials

- Render a set of vertices loaded from a file
* Check 3D perspective transformation
    * Render vertex coordinates
    - Render Normal vectors
    - Render vertex Textures

Linear
- Implement the Inverse function of mat4
- Implement the determinant function of mat4
- Implement Orhographic view transformation