Standardize scripts to control Network manager

relates #158

res/miracle-stop-network-manager

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+. miracle-utils.sh
+
+stop_network_manager
+
+WPA_PID=$(find_wpa_supplicant_pid)
+if [ -n "$WPA_PID" ]
+then
+   echo killing existing wpa_supplicant connection
+   sudo kill -9 $WPA_PID
+else
+   echo cannot find wpa_supplicant connection to kill
+   if [[ $_ == $0 ]]
+   then
+      exit 1
+   fi
+fi