Edit Install/Uninstall scripts; Update README.md

Edited Install and Uninstall scripts to handle both at_telnet_daemon and simpleadmin

simpleadmin/scripts/doAT.py

@@ -0,0 +1,31 @@
+#!/usrdata/micropython/micropython
+
+# Add the /usrdata/micropython directory to sys.path so we can find the external modules.
+# TODO: Move external modules to lib?
+# TODO: Recompile Micropython with a syspath set up for our use case.
+import sys
+# Remove the home directory from sys.path.
+if "~/.micropython/lib" in sys.path:
+    sys.path.remove("~/.micropython/lib")
+sys.path.append("/usrdata/micropython")
+
+import serial
+import uos
+
+
+atcmd = sys.argv[1]
+
+ser = serial.Serial("/dev/ttyOUT", baudrate=115200)
+ser.write(atcmd + "\r\n")
+
+uos.system("sleep 0.025s")
+# wait for an OK
+out=r''
+while ser.in_waiting > 0:
+    out += ser.read(1)
+
+if "OK" not in str(out):
+    print('Error NOT OK')
+
+print(out.decode('utf-8'))
+ser.close()