make travis test pep and lint also
E501 line too long
disables more lint errors
changes to Makefile: now tests are being runned against sourcetree, no need install to local venv
changes to .travis.yml: now uses Makefile targets for setup and testing in Travis-CI, tests against python 2.6
Merge pull request #185 from gulbinas/feat-make-travis-test-pep-and-lint-also

make travis test pep and lint also