Bumped to version 1.4.0
Fixed setup.py long_description to include new docs URL
Fixed some PyPI issues
Fixed South migrations for custom AUTH_USER_MODEL
Docs for migration mishap
Version bump
Fixed running of test suite for Python 3.3
Fixed some broken tests on Python 3.3
Introduced new IPN signals, deprecated old ones
Documented removal of PDT signals
Version bump for alpha
Corrected .gitignore