Add material Editor

[wow2006]

I will be great to add material editor using node-based examples:

1. Maya
2. UE4
3. Unity

[hhirsch]

Blender has a similar UI for its shaders so it should be possible to implement in it, too.

[wow2006]

I love the idea of the graph-based. It's used in the material editor, AI and animation blending too.