- better SQL scripts support (testing, source viewing)

make_update_script_for_model:
- calculated differences between models are actually differences between metas
- columns are not compared?
- even if two "models" are equal, it doesn't yield so

- controlledschema.drop() drops whole migrate table, maybe there are some other repositories bound to it!


0.6.0

- make logging stderr and stdout aware
- update documentation
- write documentation how to test all databases
- update repository migration script
- single pool strategy for api (decorator to close engine connection)
- wrap migration into transaction
- interactive migration script resultion
- downgrade to scripttest 1.0, report bug
- port to unittest2
- readd transaction support