Edit Install/Uninstall scripts; Update README.md

Edited Install and Uninstall scripts to handle both at_telnet_daemon and simpleadmin

attelnetdaemon/at-telnet/systemd_units/socat-smd11.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Socat Serial Emulation for smd11
+After=ql-netd.service
+
+[Service]
+ExecStart=/usrdata/at-telnet/socat-armel-static -d -d pty,link=/dev/ttyIN,raw,echo=0 pty,link=/dev/ttyOUT,raw,echo=1
+# Add a delay to prevent the clients from starting too early
+ExecStartPost=/bin/sleep 2s
+Restart=always
+RestartSec=1s
+
+[Install]
+WantedBy=multi-user.target