Move all BL to the manager. The ArgParser now only parses the CLI
arguments and creates a command which contains which command was run. In
turn, this information is passed to the manager, which will run the
appropriate business logic.
This will make it easier to add new options, separating the parsing of
the CLI options from the implementation of the logic. It also simplifies
any future effort in adding a different input (e.g. GUI).
Warning: some function were commented out, this is only a tracer bullet.
Categorizer will work directly on ORM classes, which will cleanup the
code, since changes will automatically be persisted when change the
objects.
Adds wrapper session class inside the DbClient for the manager to use.
The manager will have to have some DB session knowledge, which adds some
unfortunate coupling.
Removes some unnecessary relations between tables that were added by
mistake.
category CLI option now uses the manager.
