Update Travis CI script.

[mdickinson]

Experimental PR to update the Travis configuration:

• Get Travis working again on 2.6, 3.3 (see Python 2.6, 3.3, 3.4 and PyPy erroring travis-ci/travis-ci#2219)
• Add Python 3.4.
• Stop spamming @burnpanck.

I'm not sure how this will affect the UI tests; let's see what happens. :-)

Addresses #178.

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Refer to this link for build results: http://jenkins.enthought.com:8080/job/Traits_PR_builder/54/

[mdickinson]

Travis results are looking better: all tests pass on 2.6 and 2.7, and we're seeing failures on 3.2, 3.3 and 3.4, but the test suite is now running to completion on all those versions. The failures look like a problem in nose: nose-devs/nose#780.

[mdickinson]

The nose bug is addressed in version 1.3.3, released earlier today.

[mdickinson]

BTW, I suspect that our efforts to run the UI tests aren't actually making any difference here: we're running 463 tests and skipping 4, regardless of the PyQt install.

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Merged build finished. Test PASSed.

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Test PASSed.
Refer to this link for build results: http://jenkins.enthought.com:8080/job/Traits_PR_builder/55/

[mdickinson]

And indeed, removing the before_install script doesn't affect either the total number of tests run or the number of tests skipped.

[mdickinson]

Okay, I think this is ready to merge. @itziakos: interested in reviewing?

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Merged build finished. Test PASSed.

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Test PASSed.
Refer to this link for build results: http://jenkins.enthought.com:8080/job/Traits_PR_builder/56/

[itziakos]

👍

[mdickinson]

@itziakos: Thanks for the nose fix! Looks like we now have passing test runs on Python 2.6 through Python 3.4. 👏