Added a check to support both the ORM 2.2 and 2.3

mapping changes in doctrine common

backport some extras

Maintenance sluggable patch

[mapping] entity generator issue, should close doctrine-extensions#276

backported sortable fix, from 2.2.0 version

Backward incompatible changes of translatable

Compatibility with doctrine2.2.x versions

Compatibility with doctrine2.1.x versions