Editing 2D shaders with visual editor seems to work now.
Added Color Ramp and Curve Map to shader nodes. Fixed an issue that crashed Godot Editor right when opened.
-Working area is bigger now, solves #1148 -Using Position now works, fixes #1141 -RGB ops now work, fixes #1139 -Missing bindings to GraphEdit and GraphNode added -Shader Graph Editor Shows errors on cyclic links and missing connections