integrate pylint with Travis
squelch E0611 due to pylint not seeing distutils.version for some reason
squelch E0211 due to implementation trick in OrderedDict.update()
squelch W0102 due to implementation trick in OrderedDict.__repr__()
squelch E0102 due to legitimate progressive enhancement redefinitions of funcs
squelch E0611 under Python 2.6 where collections.OrderedDict doesn't exist
squelch E1003 under Python 2.7 since OrderedDict in the std lib conflicts w/ the recipe version
squelch E0611 under Python 2.x due to presence of Python 3 imports
squelch W0104 in test code where it's legit
squelch E0611 due to salt not being installed (per se) on/under Travis
squelch E1003 due to apparent pylint bug
Merge pull request #5991 from hulu/travis-pylint

Integrate pylint into Travis build process