Proper Organization feature, plus nyc_cod_sponsors override

Adding feature "organization" which contains Organization content type, and the "nyc_cod_sponsors" feature override for cod_sponsors.

Additionally, there were 2 "sponsor" content type fields in production that were NOT part of cod_sponsors that I removed from the "sponsor" node type and added to organization. 

Since they were not part of cod_sponsors (or, seemingly, any feature), they could not be overridden and must be manually removed from the "sponsor" content type after the "organization" feature is enabled.