For this update I primarily worked on letting you define a `Shader Feature` via the new Static Switch node. 

Static Switch nodes have two modes `Create` and `Reference` . As the initial name suggests  it will create and register a shader feature and combo. While the later will "reference" an already registered shader feature.

Inner Switches
 
You can of course have static switches within a static switch but the compile time can increase in length when doing so.

Texture Sampler Changes

In order to get the Texture Sampler nodes to play nice and not register more than once while in a subgraph that is bound to a Switch node or instanced within a regular graph or within another subgraph, I had to change how Texture Sampler nodes work in subgraphs. You can no longer define a Texture Input while in a Subgraph. You must now pass in a Texture 2D Object input from a Texture 2D Object node.

Unfortunately manual changes will be need to any of your pre existing subgraphs that you may have that use Texture Sampler nodes.

Get Dimensions Node

Added a node to let you fetch the dimensions of a Texture 2D Object in the x and y.

Image Formats

Added 5 additional image formats to choose from in the Texture Input Data when a Texture 2D Object or Texture Sampler node is selected.

Texture Object

Renamed the Texture Object dummy type from TextureObject to Texture2DObject. So as to be differentiated from TextureCubeObject.