Editor extension support added. You can automate editor experience by writing your own editor extension script. 
Below example is built, with UMG, as a tab.
This can be an entry point for procedural level generation.
codes are listed as below;
https://github.com/ncsoft/Unreal.js/blob/master/Examples/Content/Scripts/extension-spiralGenerator.js
https://github.com/ncsoft/Unreal.js/blob/master/Examples/Content/Scripts/views/helloSpiralGenerator.jade
