Updated Shell Script for Raspbian Stretch Lite

[bigbydesign]

I have updated the install.sh to install properly with Raspbian Stretch Lite. Updated script to use PHP7.0 over PHP5.

https://rpguy.com/code/install.sh

[Nodeswitch]

I had to change the permissions on the /var/tmp/oslrd/ to make them writable from the pi user for this to work, otherwise had permission errors thrown at me.

There might be a better way around doing it, but I simply added:

sudo chown -R pi:pi /var/tmp/oslrd

[yshbnsl]

@bigbydesign your updated script link for php7 is not working.

[compuvin]

See pull request #131 for updated script. Changes are similar to those listed on the site listed above but it should install the latest version of PHP regardless of the version.