calendar: Add a code example for inserting events
calendar: Add a code example for inserting events

Helps: bgo#579885

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