C# scripting and more.

Added full C# scripting support to the engine/ide. It uses embedded Mono, so C# can reach c++ and vice versa.

Lots of other small progress, including intelligent gizmos.(They work relative to your camera)

Improved shadows, now using PCF(Percentage Closer Filtering) which makes them look a lot nicer around the edges.

Added “Add Component’ feature to nodes, which is just how you add C# classes to your nodes for now, but more to come.

Also added create menu so you can now add primitives/lights and terrains to your scene.

Last notable improvement is you now have three types of light sources. Point, Directional and Spot lights.