Use the appropriate SQLAlchemy exception module
Bump up fixture version to 1.5
Added alias to release this package to pypi
Merge pull request #3 from fixture-py/use_appropriate_sqlalchemy_exceptions_module

Use the appropriate SQLAlchemy exceptions module
Fixed some tests regarding the newer versions of SQLAlchemy
Fixed test for transaction support for django 1.5
Fixed issue where _expunge_all would try to cycle through None variables
Fixed method "exists" issue