Implement Client configuration

- add mobile date network devices and configuration
- add client configuration via udev
- add GUI under networking tab
- add scripts to handle mobile data devices

config/client_config/start_huawei_hilink.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Bring up HUAWEI mobile hilink device
+			
+[Service]
+Type=oneshot
+RemainAfterExit=no
+ExecStart=/bin/sleep 15
+ExecStart=/usr/local/sbin/switchClientState.sh up
+
+[Install]
+Alias=start_ltemodem.service
+WantedBy=multi-user.target
+