Create room with customized power levels.

[bramenn]

The config.json will have a section called initial state that contains the power levels at which the rooms will be created.

"initial_state": {
        "power_levels": {
          "events_default": 0,
          "users_default": 0,
          "state_default": 50,
          "events": {
            "m.room.avatar": 0,
            "m.room.name": 0,
            "m.room.topic": 0,
            "m.room.message": 0
          }
        }
      }