possible bug in [install.sh] script

[RobertLucian]

It seems that when trying to install Arduberry on a fresh Jessie image, we get an

error on line 8 regarding user/bin/realpath

As quoted on this post:

• http://forum.dexterindustries.com/t/raspberry-pi-gpio-missing-in-arduino-ide-programmer-list/3291/1

Here's the line that's supposed to throw an error:

• https://github.com/RobertLucian/ArduBerry/blob/master/script/install.sh#L8

We're not sure at the moment that it's not working, so we may need to do some tests before declaring it a bug.