Add DealSponsored event handler

[gfournieriExec]

No description provided.

[Le-Caignec]

Just one commentary

[Le-Caignec]

you should load an entity before creating it. It prevent bugs when the graphNode make some re-indexing tricks:

Suggested change

	let dealSponsoredEvent = new DealSponsored(createEventID(event));
	dealSponsoredEvent.transaction = logTransaction(event).id;
	let dealSponsored = DealSponsored.load(createEventID(event))
	if (!dealSponsored){
	dealSponsored = new DealSponsored(createEventID(event));
	}
	dealSponsored.transaction = logTransaction(event).id;

[jeremyjams]

Thanks :)