Add example use of repositoryClass in YAML
Update annotations-reference.rst

@JoinTable because of mapping defaults does NOT have required attributes. Updated annotations reference to show them as optional.
Merge pull request #836 from Dragonrun1/master

Update annotations-reference.rst
Merge pull request #834 from carlosbuenosvinos/patch-1

Add example use of repositoryClass in YAML
Spelling fix
Spelling fix
Merge pull request #839 from flack/patch-3

Spelling fix
Merge pull request #838 from flack/patch-2

Spelling fix