Rendering

This module contains the high-level rendering functionality.

• add a MeshBuilder to easily create meshes for debugging purposes (currently stub implementation)
• add move the creation functions (tangentvertex) in GeometryData to the MeshBuilder
• add some helper functions to manipulate meshes
• support colored rendering
• support transparency
• add debug visualizations
• fix CSM boundingbox calculation
• find why SSAO is so slow
• the IMesh should be converted to SlimDX math