Add CORS header to devserver.
Add CORS header to devserver.

dweintrop/pencilcode,cacticouncil/pencilcode,xinan/pencilcode,davidbau/pencilcode,sakagg/pencilcode,sakagg/pencilcode,xinan/pencilcode,davidbau/pencilcode,sakagg/pencilcode,PencilCode/pencilcode,Dinuka2013513/pencilcode,xinan/pencilcode,Dinuka2013513/pencilcode,sakagg/pencilcode,dweintrop/pencilcode,Dinuka2013513/pencilcode,davidbau/pencilcode,cacticouncil/pencilcode,dweintrop/pencilcode,PencilCode/pencilcode,cacticouncil/pencilcode,davidbau/pencilcode,xinan/pencilcode,Dinuka2013513/pencilcode,davidbau/pencilcode,PencilCode/pencilcode,dweintrop/pencilcode,PencilCode/pencilcode,cacticouncil/pencilcode