- Temporarily switched to serial execution to make it easier to debug the application.
- Implemented graphics::vsd::isBackface
- Removed RenderTask::_render member variable. RenderTasks are now decoupled from
  Renderers to make it easier to manage concurrent task execution.
- Added stubs for the Polygon, Random and Texture render tasks.
- Added Fragment::interpolate to interpolate a fragment based on two others.
- Added ColorRGB::merge and ColorARGB::merge to merge color channels into a single
  32-bit integer.
- Merged Mesh and Model3D classes. Consequently, Face is no longer a nested class.
- Implemented the Wireframe render task using the Bresenham and Xiaolin Wu line algorithms.
- Renamed Framebuffer::write to Framebuffer::plot as its more comprehensible.
Removed mesh.hh and mesh.cpp