New Matrix space, 3 new rooms

We now have a Matrix space (#beacondb:libre.net.au), along with 3 new rooms:

• beaconDB hardware (#beacondb-hardware:libre.net.au)
• beaconDB off topic (#beacondb-offtopic:libre.net.au)
• beaconDB in the media (#beacondb-media:libre.net.au)