reciprocity/ggrc-core — pull request #57 by vraj-reciprocity (2013-06-29 17:45:05+00:00)
Title: Feature/cascade delete - phase 1 - SQLAlchemy changes; no db schema changes

Deferring db schema changes for the following reasons:
- MySQL issue with downgrading unique constraints involving foreign keys
- desire to close sprint out with commitable work (cascade delete works, db schema changes are nice-to-have)