added explicit mapping tests for cascade
do not initialize on unwrap
Set Uuid on document on insert.

- Also throw Exception if Uuid is designated more than once.
Corrections
Merge pull request #206 from dantleech/set_uuid

Set Uuid in executeInserts
fix missing return statement
fix parent mapping to contain the cascade option
Merge pull request #207 from doctrine/parent_mapping

fix parent mapping to contain the cascade option
fixed handling of the cascade mapping option with annotations
Merge pull request #209 from doctrine/cascade_and_annotations

fixed handling of the cascade mapping option with annotations
added support for merge()

see http://doctrine-project.org/jira/browse/PHPCR-13
Merge pull request #205 from doctrine/merge_support

Merge support
improve UnitOfWork::objToStr() to be able to provide an id/path in more cases
Merge pull request #210 from doctrine/tweak_obj_to_str

improve UnitOfWork::objToStr() to be able to provide an id/path in more cases
always include the id in objToStr()
tweaked exception messages in doMerge()
use the chooser default locale when loading translations for a NULL locale
Merge pull request #211 from doctrine/use_default_locale

use the chooser default locale when loading translations for a NULL locale
Add a method to return the node given the document
Merge pull request #213 from aabdou/master

Add a method to return the node of the given document