Dovesnap

- add JSON endpoint to get dovesnap state
- log MAC address of containers
- Update faucet, faucetconfrpc, certstrap, grafana, grpc

- allow ACL on NAT port
- tests check mirror flows are present
- mirror bridge should pass through packets with any VLAN tag
- fix viz crash when no ip command
- upgrade logrus, faucetconfrpc, grafana

- fix race condition that could lead to multiple containers with same OFPort
- add NAT port mapping (-p) support via network gateway IP
- Remove OVS privilege when in userspace mode
- Move to go mod from dep ensure
- Viz script timeout/missing IP fixes
- update faucetconfrpc, OVS

- update faucetconfrpc, certstrap
- graph_dovesnap vizualization script
- support OVS userspace mode

- add/remove non-dovesnap managed ports to bridges to FAUCET
- ARM compatibility
- Updated grafana, faucetconfrpc

- Add option for using DHCP
- Ability to restart dovesnap and have it recovering existing networks
- Updated grafana, faucet and gauge