Switch Travis runs from Ubuntu Precise to Trusty (#249)
Switch Travis runs from Ubuntu Precise to Trusty (#249)

See:
https://docs.travis-ci.com/user/trusty-ci-environment/

This also fixes the warning about not using a C++11 compiler:
https://docs.travis-ci.com/user/languages/javascript-with-nodejs#Node.js-v4-(or-io.js-v3)-compiler-requirements

Note this intentionally isn't switching to their container based
infra, since whilst it has faster boot times, these jobs still take
longer at the moment, due to the lower CPU/RAM allowances. If #248
manages to improve the overall runtime this may be worth revisiting.
edmorley/neutrino-dev,mozilla-neutrino/neutrino-dev,eliperelman/neutrino-dev,mozilla-neutrino/neutrino-dev,edmorley/neutrino-dev