Common:
- Implemented Message Brokering framework supporting multiple backends
- Implemented InMemory Message Brokering Backend for testing purposes
- Implemented Redis Backend
- Implemented Message Brokering unit tests
- Minor improvements in ORM Framework
- Added Message Broker framework unit testing into automated local tests

- Context Database API and ORM rework in progress

- Complete rework of Database API
- Integration of Database API into Context
- Improvement of API

This commit is not a final implementation, just an intermediate backup.