Simple video using shaders on Pi

[daviderovell0]

(#2)
Shaders should provide a flexible way to generate and manipulate video in real time through GPU.

We need to make a simple repetitive video that uses shaders, the basic workflow should be:

• Write the OpenGL wrapper / main rendering function
• Import the shader
• parametrise (i.e. use keystrokes to modify some aspects)

----> test on the Raspberry Pi.
We need to ensure real rime execution on the Pi, further testing might be required.

[daviderovell0]

@deetrone implemented a moving triangle working smoothly on the PI.