Add exposable value nodes

[Siccity]

Exposable value nodes are very simple, and only contain a single output with a float, string, bool etc. Optionally you can enable "Simple GUI" to quickly get an IMGUI input, slider or button on the screen. This node will also have an open API with public methods such as SetValue(float val) Toggle(); etc, to that it can be referenced from custom UGUI controls. A small variety of premade ugui setups may be included in the project folder.

These nodes will be found in

• Exposed Values/Exposed Float
• Exposed Values/Exposed Int
• Exposed Values/Exposed String

[Siccity]

First draft of the nodes are implemented