Cocoa 3D Tutorial 0.3

Cocoa 3D Tutorial will provide a Cocoa framework to interface the OpenGL library in a more OO-fashioned style. It is not meant to be the fastest code possible, nor to leverage all the power of OpenGL, but to give developers a easy way to start working in 3D.
NOTE: Cocoa 3D Tutorial is licensed and distributed under the terms of the Artistic License.

Main features:
- A scene tree, with cameras (one for each view) that can be easily positioned and oriented, and lights.
- Object picking, that allows an interactive manipulation of the scene.
- Factory classes for common objects (cube, sphere, cylinder, ...), groups and transformations.
- Basic OpenGL optimizations (e.g. display lists)
- Full support for OpenGL colors and materials.
- Static textures (read from a graphic file or generated from a styled text), animated textures (read from movies), procedural fixed and animated textures (using configurable Perlin 2 & 3D noise).
- Full support for ARB_vertex_program extension, seen as a special type of texture.
- An animator class, that allows to easily add dynamic components to a scene.

Enhancements
- Added StringTexture class
- Added AnimatedProcTexture class
- Added PlainSurface class
- Added InteractiveView class
- Corrected and updated some class behavior
- Updated Tutorials to use new classes