Version 0.11.0

• Added a rich text system. This allows the user to draw non-monospaced text, and it's based on BMFont. An example has been added to show how to use it to render text. It can render
  text by using one quad per character, or by rendering to a texture which is then drawn as a single quad.
• Fix "properties" typo. This involves renaming some functions, but compatibilty definitions have been added.
• Update calls to GRF libnds functions after their prototypes have changed.
• Cleanup setup of dual 3D modes that involve setting up 2D sprites to be used as a framebuffer.
• Now the size of a sprite is set to the size of the material it is assigned. It can be modified later as usual.