Added error handling for 404s when dealing with files.
Added error handling for 404s when dealing with files.

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