Add travis testing with pep8

This was discussed with @mart-e on #84

This adds config files for the travis-ci.org and coverage.io git webhooks for Odoo 7.0

It will run tests and generate a coverage report of lines actually run.
It also checks if commits and PRs are pep8 but will only report on lines in diff.
Alternatively, it can report on an entire function with the `git diff -W` command

Signed-off-by: Sandy Carter <sandy.carter@savoirfairelinux.com>