Redesign documentation

[SirMallard]

The current documentation is fairly limited and does not provide a good explanation of many of the important aspects of using Iris. A general overhaul of information and better tutorials and teaching is needed for the documentation so that it goes beyond just being an API info section.

[warprbx]

I agree, had to look in the demo to understand it haha

[SirMallard]

I've been working on improving the overall documentation which is visible on the docs branch at the moment. It will take a bit of time to update everything and include enough additional information to properly explain how Iris works and the best ways to integrate it into a game.