fixed DocumentPersister::loadReferenceManyWithRepositoryMethod() with hint slave okay
extract DocumentPersister::createReferenceManyInverseSideQuery()
extract DocumentPersister::createReferenceManyWithRepositoryMethodCursor()
PersistentCollection::count() with ReferenceMany InverseSide mapping queries DB without collection initialization
Small code formatting tweaks
Revise Complex References documentation
Update documentation version and copyright date
Merge pull request #649 from doctrine/gh543

PersistentCollection::count() improvements