Python platformer prototype

[megamarc]

I've spawned a new GitHub project that will act as a series of work-in-progress, showing how to implement actual game mechanics with tilengine:
https://github.com/megamarc/TilenginePythonPlatformer

The features implemented so far are:

• Two layer parallax scrolling
  
• Sprite and tileset animations
  
• Raster effects for sky gradient color, cloud motion, sea water linescroll and hills movement on a single background layer
  
• Basic list of game entities (actors)
  
• Three character states: idle, running and jumping
  
• Tileset attributes in Tiled editor: type and priority
  

[megamarc]

Updated platform prototype in WIP2: adds player/level interacion showing the usage of Layer::get_tile() and Tilemap:: set_tile() methods, to get info about the environment and modify it, respectively:
https://youtu.be/uQiE7VM_8r8