TODO

[ ] Essential:
  [ ] Model;
    [ ] Creating;
    [ ] Model parsing;
    [ ] Mesh:
      [ ] Custom vertex format;
      [ ] Draw without VAO
  [ ] Text render;
  [ ] Camera;
  [ ] Animated Texture;
  [ ] Lighting:
    [ ] Ambient light;
    [ ] Directional light;
    [ ] Point light;

[ ] render:
  [ ] primitives:
    [ ] 2D stuff:
      [ ] draw_triangle;
      [x] draw_line;
      [x] draw_rectangle;
      [x] draw_circle;
    [ ] 3D stuff:
      [ ] draw_line;
      [ ] draw_triangle;
      [ ] draw_plane;
      [ ] draw_cube;
      [ ] draw_sphere;
  [ ] gizmos:
    [x] infinity grid;
  [ ] text render module;

[ ] resource management
  [ ] Cache shaders;
  [ ] Cache meshes;

[ ] Advanced
  [ ] Runtime shader code generator;
  [ ] Configurable Vertex class & mesh;

[x] Window:
  [x] Remove the glfw initialization from gl_impl;
  [x] Make the graphics library independent from glfw;

[ ] Quality & beauty
  [ ] make::really::long::namespaces::shorter;
  [ ] VAO - Model, VBO & EBO - Mesh