Update Travis-CI scripts to test against Arduino v1.0.6

As travis-ci is using zips instead of packages i thought we may as well download the latest non-beta release.

Arduino releases are no longer on googlecode.com they are direct from arduino.cc

Would be nice to eventually pass in a version flag rather than hardcode it in 2 files, we could then maybe test 1.5.7 alongside 1.0.6 without breaking chipkit dependencies.