Edit Install/Uninstall scripts; Update README.md

Edited Install and Uninstall scripts to handle both at_telnet_daemon and simpleadmin

simpleadmin/systemd/simpleadmin_generate_status.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Simpleadmin service to generate status from modem
+Requires=socat-smd11.service
+
+[Service]
+ExecStart=/usrdata/simpleadmin/scripts/build_modem_status
+Restart=always
+
+[Install]
+WantedBy=multi-user.target