corrected apt-get option (--assume-yes)

install.sh

 #!/bin/sh
 
 echo "Installing required packages"
-for i in `apt-get -y install \
+for i in `apt-get --assume-yes install \
 	build-essential \
 	linux-headers-amd64 \
 	iptables-persistent \
 
 
 echo "Removing unused packages"
-for i in `apt-get -y remove --purge nano`; do echo -n "."; done
+for i in `apt-get --assume-yes remove --purge nano`; do echo -n "."; done
 echo " Done"