Cleanup imports
Correct module name reference.
Fix reference
Apply coding standards - Entity suffix on Doctrine entities.
Refactor Extensions module to namespace
Merge pull request #684 from drak/extensions_ns

Refactor Extensions module to namespace
Refactor ModUtil to Doctrine.
Backport Doctrine conversions from 2.0
Merge pull request #685 from drak/ext_d2

Convert Extensions module to Doctrine 2
Merge branch '1.3'
Added import and fix some undefined variables
Merge branch '1.3'