documents: Add arbitrary file support to GDataDocumentsFeed
documents: Add arbitrary file support to GDataDocumentsFeed

GNOME/libgdata,Distrotech/libgdata,pwithnall/libgdata,pwithnall/libgdata,Pecisk/libgdata,Distrotech/libgdata,Pecisk/libgdata,Pecisk/libgdata-gtasks,Distrotech/libgdata,Pecisk/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata-gtasks