Added referenced code for deleting nodes.
Added referenced code for deleting nodes.

mjmostachetti/grasshopper-core-nodejs,grasshopper-cms/grasshopper-core-nodejs,Solid-Interactive/grasshopper-core-nodejs,mjmostachetti/grasshopper-core-nodejs,Solid-Interactive/grasshopper-core-nodejs,grasshopper-cms/grasshopper-core-nodejs