added base64 encode for workunits
added base64 encode for workunits

teharrison/AWE,paczian/AWE,teharrison/AWE,paczian/AWE,paczian/AWE,teharrison/AWE,wgerlach/AWE,wgerlach/AWE,wgerlach/AWE,paczian/AWE,teharrison/AWE,MG-RAST/AWE,wgerlach/AWE,MG-RAST/AWE,teharrison/AWE,paczian/AWE,wgerlach/AWE,wgerlach/AWE,paczian/AWE,MG-RAST/AWE,MG-RAST/AWE,MG-RAST/AWE,teharrison/AWE,MG-RAST/AWE