Install script improvement

- switched to output checking

install.sh

@@ -9,7 +9,7 @@ sudo pip install adafruit-pca9685
 sudo apt install vsftpd
 sudo apt install vlc
 sudo modprobe bcm2835-v4l2
-if [hash pip3];then
+if [[hash pip3]];then
     pip install pygame
     exit 0
 fi