added first example.
fixed ES2 shader for simpleColorQuad example.
Merge branch 'shaderExamples' of https://github.com/openframeworks/openFrameworks into develop
adding vertex demo
 updating vertex demo
example_02 for GL3 done

- example draws wireframe of a plane.
- global color is used to color in plane.
- mouseY value rotates the plane.
example_02 GL2 version is working.
adding the texturing sample
Merge branch 'shaderExamples' of https://github.com/openframeworks/openFrameworks into shaderExamples
example 02, ES2 shader is working.
Merge branch 'shaderExamples' of https://github.com/openframeworks/openFrameworks into shaderExamples
added image and fixed shader paths
Merge branch 'develop' of github.com:openframeworks/openFrameworks into shaderExamples
Merge branch 'shaderExamples' of github.com:wasawi/openFrameworks into shaderExamples
shader examples: fix capitalization for include
shader 03 example is done.
Merge branch 'shaderExamples' of https://github.com/openframeworks/openFrameworks into shaderExamples
changed back to standard window size.
alpha masking example for GL3 is working.
example 05 shaders for GL2 are working.