Allow failure for Python 3.4
Allow failure for Python 3.4

Sublime Text 3 runs on Python 3.3, so that's the only version
that absolutely must pass all tests.

paulirish/SublimeLinter3,zenlambda/SublimeLinter3,smanolloff/SublimeLinter3,zenlambda/SublimeLinter3,paulirish/SublimeLinter3,ikappas/SublimeLinter3,ikappas/SublimeLinter3,simonzack/SublimeLinter3,SublimeLinter/SublimeLinter3,SublimeLinter/SublimeLinter3,smanolloff/SublimeLinter3,simonzack/SublimeLinter3,jasonrhaas/SublimeLinter3,jasonrhaas/SublimeLinter3