^^^^^^^^^^^^^^^^
- Added __repr__ for Transaction class, issue 59
- Made transaction_cls of VersioningManager configurable.
- Removed generic relationships from transaction class to versioned classes.
- Removed generic relationships from transaction changes class to versioned classes.
- Removed relation_naming_function (no longer needed)
- Moved get_bind to SQLAlchemy-Utils
- Removed inflection package from dependencies (no longer needed)
- SQLAlchemy-Utils dependency updated to 0.26.2