Views integration: setup relation: type as filter_in_operator instead of string #1365406 by dereine.
Replace relationship definitions to cover all the bases and so Relation plays well with Views. #1361780 by solotandem, dereine and chx. Needs followups
Issue #1265434 Expose relation in an entity list wrapper containing all related entities by jsacksick.
Issue #1271046 by Damien Tournoud and jsacksick Expose the relation-type specific fields. (against my better judgement.
Issue #1312196 by Bobík : edit widget does not work with multiple values. (although i have no idea whether this is a problem or not, this cant hurt
Issue #1323142 mostly fixed by now but the unset and the changed part is still valid. By mrsinguyen and chx.
This reverts commit 9c46180a. Conflicts: relation.module