Enable Python 3.4 on Travis CI.
Enable Python 3.4 on Travis CI.

jakirkham/hy,paultag/hy,farhaven/hy,aisk/hy,tianon/hy,zackmdavis/hy,freezas/hy,kirbyfan64/hy,larme/hy,kirbyfan64/hy,michel-slm/hy,farhaven/hy,larme/hy,tuturto/hy,aisk/hy,kartikm/hy,tianon/hy,aisk/hy,Foxboron/hy,algernon/hy,adamfeuer/hy,gilch/hy,larme/hy,ALSchwalm/hy,timmartin/hy,mtmiller/hy,Foxboron/hy,farhaven/hy,tianon/hy,Tritlo/hy