- Handles nic connections instead of vms. New NIC model and NICs
  collections created to handle the NIC api logic. NIC models get
  updated on each vms/networks api call.
- New private network creation form.
- Display additional fields on private networks list (cidr, nic ip)
- New cyclades ui settings introduced. UI_NETWORK_AVAILABLE_NETWORK_TYPES,
  UI_NETWORK_AVAILABLE_SUBNETS, UI_NETWORK_ALLOW_DUPLICATE_VM_NICS,
  UI_NETWORK_STRICT_DESTROY.