Allow unverified/external argparse for Python 2.6 and pip 1.5+
Merge pull request #157 from jcjf/travis-py26

Allow unverified/external argparse for Python 2.6 and pip 1.5+
Remove useless files
Merge pull request #179 from harobed/remove_plugins_cfg

Remove useless files
Merge remote-tracking branch 'upstream/master'