Scaffold multiple thread support in TheHub/__main__.py.
Update __main__.py to instantiate bridge objects.
Update db.Sensor and create init_db script.
Merge pull request #42 from reillysiemens/db

Update database code and improve TheHub module __main__.py
Add db.Notification and db.Severity classes.
Merge pull request #43 from reillysiemens/db

Add db.Notification and db.Severity classes.
Add to_dictionary methods to db.Notification and db.Severity classes.
Changes to bridge return messages, now using sqlalchemy objects
Merge pull request #44 from reillysiemens/db

Add to_dictionary methods to db.Notification and db.Severity classes.
Merge pull request #45 from andyweaver/bridge-work

Changes to bridge return messages, now using sqlalchemy objects
Add d3 bower dependency
Prepping for repo reconnection