Updating examples and readme to use serial port
Merge pull request #26 from hybridgroup/serial-examples

Updating examples and readme to use serial port
Fixing serial examples
Merge pull request #27 from hybridgroup/serial-examples

Fixing serial examples
Updated Rubinius version

The RBX builds were failing unexpectedly as bundler could not be found.

https://travis-ci.org/hybridgroup/artoo-arduino/jobs/25281604

Updating to the latest version of Rubinius resolved the issue.
Merge pull request #28 from adamphillips/fix/rbx-build

Updated Rubinius version
Updating version to 1.4.3