Emptied the documentation output directory
Emptied the documentation output directory

This output directory needs to be empty in order to automatically
publish the documentation.

jacobdai/CuraEngine-1,fxtentacle/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine,mspark93/CuraEngine,mspark93/CuraEngine,electrocbd/CuraEngine,markwal/CuraEngine,patrick3coffee/CuraTinyG,markwal/CuraEngine,pratikshashroff/pcura,uus169/CuraEngine,fxtentacle/CuraEngine,electrocbd/CuraEngine,patrick3coffee/CuraTinyG,markwal/CuraEngine,alex1818/CuraEngine,alephobjects/CuraEngine,alex1818/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,ROBO3D/CuraEngine,totalretribution/CuraEngine,totalretribution/CuraEngine,pratikshashroff/pcura,Ultimaker/CuraEngine,patrick3coffee/CuraTinyG,jacobdai/CuraEngine-1,totalretribution/CuraEngine,uus169/CuraEngine,Ultimaker/CuraEngine,fxtentacle/CuraEngine,mspark93/CuraEngine,electrocbd/CuraEngine,alex1818/CuraEngine,uus169/CuraEngine,jacobdai/CuraEngine-1