fixed type-hinting in addDefaultMutator and added tests for it
adapted this fix to new specifications
Fixes  Issue #724

Added missing require of Propel class for static call Propel::initConnection
Removed nested dirname :)
Merge pull request #791 from Gamesh/master

Fixes  Issue #724
Merge pull request #768 from rvitaliy/fix-typehinting

fixed type-hinting in addDefaultMutator and added tests for it