Materialize all claimable provinces into a view with a column for the
claim type. the `provinc` column contains duplicated rows but each row
contains a unique combination of province and claim type.
This makes it much easier to search possible conflicts, or to list the
availability of provinces.
Related to #17
Renames the `/ping` command to `/info` and adds the following
information to the Discord response
* Uptime of the server
* Total number of claims currently held
* Total number of unique players holding claims
William Perron