run openaps-install.sh from dev branch

Since github deprecated git:// URLs, the openaps-install.sh from the master branch no longer works.

Download openaps-install.sh from the dev branch, and install from the dev branch, until we release 0.7.1 to master.

Author: scottleibrand

docs/docs/Build Your Rig/edison-install.md

@@ -48,8 +48,8 @@ ifdown wlan0; ifup wlan0
 sleep 10
 echo -ne "\nWifi SSID: "; iwgetid -r
 sleep 5
-curl https://raw.githubusercontent.com/openaps/oref0/master/bin/openaps-install.sh > /tmp/openaps-install.sh
-bash /tmp/openaps-install.sh
+curl https://raw.githubusercontent.com/openaps/oref0/dev/bin/openaps-install.sh > /tmp/openaps-install.sh
+bash /tmp/openaps-install.sh dev
 )
 ```