Add contentDescription property to RichEvent.
Add contentDescription property to RichEvent.

--HG--
extra : convert_revision : 1a184e9e4eecd5d5f054f8396e251d19f63da07f

bramd/spiel,beqabeqa473/Asra,bramd/spiel,bramd/spiel,beqabeqa473/Asra,beqabeqa473/Asra