* Added documentation to Clyde on the sprite rendering calls.
* Added a rotation debug entity.
* Non-directional RSIs and raw textures are now rotated properly.
* Directional RSIs and Sprite Smoothing work.
* Remove the Directional flag usages.
* Supports layers with different numbers of directions.
* Fixes window rendering.
* Removed the Interfaces folder.
* All objects inside the GameObjects subfolders are now in the GameObjects namespace.
* Added a Resharper DotSettings file to mark the GameObjects subfolders as not providing namespaces.
* Simplified Robust.client.Graphics namespace.
* Automated remove redundant using statements.
* Attempted Clyde cleanup, didn't get far.
* Add negation operator to Vector2i.
* Add RenderOrder to ISpriteComponent.
* Post process shaders.
Adds "post process" shaders to sprite component.
These are executed on the WHOLE sprite component (every layer)
in one draw.
This is necessary to implement functional outlines.
Pieter-Jan Briers