Added: second parameter to ContentGateway::deleteRelation()
Added: new method FieldType::getRelations()
Removed: external storage for Relation and RelationList field types
Added: second parameter to ContentHandler interface
Implemented: RelationProcessor
Implemented: process relations on Content create and update
Implemented: process relations on swapping Locations
Added: integration tests for processing field relations
Fixed: handling empty array of links URLs
CS
Merge branch 'master' into EZP-20097-RefactorRelations
Removed: external storage config for Relation and RelationList from Core bundle
Merge branch 'master' into EZP-20097-RefactorRelations
Fixed: combined if blocks
Updated: refactor remove relations block for simplicity and clarity
Fixed: unexisting Relation type in code example
Tested: RelationProcessor
Fixed: Legacy Storage composite entries not expanded, simplified if expression
Merge branch 'master' into EZP-20097-RefactorRelations
Removed: processing relations on location swap (separate issue)