Merge pull request #9 from akadamson/master

non-critical update
Bugfix for Linux compilation

Update "i2c.h" file name case. So it works on sensible file systems as well.
Prevent crash when no serial port present

This patch allows the user to launch the app, event if no serial port has been detected.
Merge pull request #12 from Jerome-PS/patch-2

Prevent crash when no serial port present
Merge pull request #10 from Jerome-PS/patch-1

Bugfix for Linux compilation