Make sure the gpio tool is installed

My freshly installed raspbian lacked the gpio tool used in the reconnect script.
Please also include this installation (part of the wiringpi package)

ppp_installer/install.sh

@@ -80,8 +80,8 @@ fi
 #	esac
 #done
 #'
-echo "${YELLOW}ppp install${SET}"
-apt-get install ppp
+echo "${YELLOW}ppp and wiringpi (gpio tool) install${SET}"
+apt-get install ppp wiringpi
 
 echo "${YELLOW}What is your carrier APN?${SET}"
 read carrierapn 
@@ -191,4 +191,4 @@ do
 done
 
 read -p "Press ENTER key to reboot" ENTER
-reboot
+reboot