fix mimeType for sheet + add other mimes
fix mimeType for sheet + add other mimes

+ Fixes the mimeType for sheet to .spreadsheet from .sheet.
+ Also adds in mimeTypes for Google presentations + scripts.

tom-saunders/drive,gdm85/drive,gdm85/drive,sselph/drive,OldDragon2A/drive,OldDragon2A/drive,tom-saunders/drive,fgrosse/drive,wadtech/drive,pefoley2/drive,brianjking/drive,Qbitz/drive,shaunstanislaus/drive,aeppert/drive,sjfloat/drive,cacack/drive,js-ojus/drive,cacack/drive,FreedomBen/drive,Laeeth/drive,PseudoAj/drive,Dedsec01/drive,shaunstanislaus/drive,orinocoz/drive,brianjking/drive,wadtech/drive,hatchling/drive,gccpacman/drive,stffrdhrn/drive,Dedsec01/drive,sselph/drive,mralexgray/drive,pefoley2/drive,orinocoz/drive,mralexgray/drive,odeke-em/drive,miguelinux/drive,js-ojus/drive,fgrosse/drive,sjfloat/drive,hatchling/drive,miguelinux/drive,odeke-em/drive,aeppert/drive,PseudoAj/drive,gccpacman/drive,FreedomBen/drive,Qbitz/drive,Laeeth/drive,stffrdhrn/drive