Implemented foundation for AWD parsing.
More progress on the AWD parsing, now successfully parsing the vertices but still having a few issues and not convinced yet that this is a solid design overall.
Further progress made on the parser. Now parsing all mesh data which opens a new perplexing problem that the AWD exporter does not seem to export normals =/
Merge branch 'master' of https://github.com/MasDennis/Rajawali into AWD

Conflicts:
	src/rajawali/parser/StlParser.java
Added support for specular textures to the obj parser.
Added support for texture tiling on planes.
Removed the resetGLState() call from RajawaliScene's constructor to onSurfaceCreated() in RajawaliRenderer. The reason for this is the fact that it was called before the OpenGL context was created. This resulted in errors.
Fixes #826

Added helper methods to `RajawaliRenderer` and `RajawaliScene` for
`Plugin` addition/removal.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>
Added methods to allow for integration with augmented reality fameworks. A Rajawali-Vuforia template will be pushed to Github soon.
Merge branch 'master' of https://github.com/MasDennis/Rajawali
Added a link to the Rajawali + Vuforia repository.
Bug fix: uv coordinates were rotated when plane was facing up.
Added a method on BaseObject3D that returns the world space coordinates.
Update README.md

Minor formatting fix for hyperlinks on Vuforia section.
Update README.md

Added descriptive link names.
Update README.md

Line break for Vuforia links.
Implemented basic AWD parsing and exporting. Parsing and exporting is now functional for geometry only.
Bug fix: issue #830 the orient to path calculation wasn't correct.
Merge branch 'master' of https://github.com/MasDennis/Rajawali
Fixes issue #812 Spot light spots thru solid objects. spot_factor was multiplying the final diffuse color instead of the light colour.