Clean up the .travis.yml a bit, add python 2.6
Clean up the .travis.yml a bit, add python 2.6

quantopian/datashape,ContinuumIO/datashape,blaze/datashape,llllllllll/datashape,cpcloud/datashape,cowlicks/datashape,FrancescAlted/datashape,aterrel/datashape,cpcloud/datashape,llllllllll/datashape,quantopian/datashape,FrancescAlted/datashape,ContinuumIO/datashape,blaze/datashape,cowlicks/datashape,aterrel/datashape