Travis CI: re-enabling Linux building/testing now that Qt 5.5 seems to be available on Ubuntu 12.04 LTS via Stephan Binner's PPA.
Travis CI: re-enabling Linux building/testing now that Qt 5.5 seems to be available on Ubuntu 12.04 LTS via Stephan Binner's PPA.

Fairly/opencor,Fairly/opencor,mirams/opencor,Fairly/opencor,Fairly/opencor,mirams/opencor,Fairly/opencor,mirams/opencor,mirams/opencor,mirams/opencor