Add ODM unique_base support
Merge branch 'master' of github.com:quaninte/DoctrineExtensions
Minor fix to docs
Merge pull request #650 from jcroll/master

[RFC] Yaml code example in docs was not within code block.
Merge pull request #647 from quaninte/master

Add unique_base support for sluggable ODM adapter
[tools] add a way to clear object references