Fix some translation failure and fix some fizzy translation
Fix the VERSIONUTILS_VERSIONING_ENABLED setting.

Prior to this fix, the setting wasn't really working anymore because we weren't
created a .versions() manager on models.
Dont m2m_changed signl if instance isnt versioned.
apt-get update before everything
Merge pull request #518 from groovecoder/travis-fetch-archives

apt-get update before everything
fix #506 - add coveralls to travis build
Merge pull request #519 from groovecoder/travis-coveralls

fix #506 - add coveralls to travis build
pip --use-mirrors on travis to help install errors
Merge pull request #522 from groovecoder/travis-pip-use-mirrors

pip --use-mirrors on travis to help install errors
Merge pull request #521 from Georepublic/japanese_i18n_fix

Fix some translation failure and fix some fizzy translation
Merge branch 'master' into master_ja_update_upstream