Support simple default database.
Fix syntax error on import (wake up sleepy Zeth).
Merge branch 'dbsupport'
Merge branch 'master' of https://github.com/zeth/magpy
Merge branch 'master' of https://github.com/zeth/magpy
Merge branch 'master' of https://github.com/zeth/magpy
Merge branch 'master' of https://github.com/zeth/magpy
Allow all powerful settings.py for database config.