Merge branch 'develop'
Version 0.1 : basic architecture.
Merge branch 'develop'
v0.2 :
* the LightingShader object now works.
* add all the existing shaders
* add the README
v0.3: All GLSL330 Phong & Blinn-Phong shaders now work.

Merge branch 'develop'
v0.4: All GLSL120 shaders are now working.
Merge branch 'develop'
v0.5: The shaders using the old texture name are now fixed.

Provides a default material to prevent random results when user doesn't
provide one.

Errors and warnings are now logged.
Merge branch 'develop'
v0.5.1: Fix a bug with the shaders when not using textures.
Adding compatibility with textures for the shaders broke them when not
using textures. This is now fixed.

The shader is reloaded each time useTexture or removeTexture are called.

Merge branch 'develop'
v1.0
Fix bugs, add examples, major cleaning up of the repository.

This is the first 'usable' version of the addon.

Merge branch 'develop'
Version 2.0

No new features but a change of approach that changes a lot from the previous ones.
Copying the data/ folder of the addon is so cumbersome, not talking of the double
space taken by the shaders if one forgets to delete it in the original addon folder.

Decision has thus been made to instead incorporate the minified version of shader
sources directly into the addon code and load it internly. No more need for additional
extern shader files.

This approach simplifies a lot the installation and use process.

- Update the README

- Add the ofxaddons thumbnail image