[#13] Inital code for beta

Big pull request :-( After this we should go for small chunks again...

- Added documentation with Codox
- Added start & end subscriptions
- Added message type validation using Schema
- Added message type computation using Graph
- Added project-donate & user-notified event types
- Added drafts & events layes
- Added store-mem & db< (db chew) macro
- Added dev mode for liberator and logging levels
- Added tests for unsupported media requests
- Added dev/user and configured project file
- Added inital main & system namespaces