Add 'presented by' block for CiviCamps
CiviCamps are intended to be local in the sense that they're locally run by volunteers and attended by local end user or new prospect organizations. Because of this, and for added incentive to organize a camp, let's add a "presented by" block similar to the sponsored by w/ logos of event organizers.
Organizers can be either providers or end user organizations. This block should display the logo for each such organizer equally.
Note current camps on the books, organized by:
CiviCamp Montreal: Coop Symbiotic (https://civicrm.org/providers/Coop-SymbioTIC)
CiviCamp Hartford: Greenleaf Advancement (https://civicrm.org/providers/Greenleaf-Advancement), Tadpole Collective (https://civicrm.org/providers/Tadpole-Collective). Addition organiser logos will be added to this one.