Django 1.5 compatibility.
Refactor NaturalManager to get rid of DeprecationWarning.
Remove deprecated natural_manager function.
Prepare 0.5 release.
Fix bad import, fix NaturalManager and test.
Prepare 0.5.1 release.
Fix reference creating.

Thanks for Fedoseev Ivan for spotting.
Flake8 compilance.
Update README.
Add reset option to synchro view.

Thanks Fedoseev Ivan for idea.
Prepare all texts for translation.
Add PL translation and simple test.
Remove .mo file from repo, but ensure they will be present in distribution.
Add German translation.
Merge pull request #5 from deschler/master

Add German translation
Add authors file.
Fix installation readme: state that `dbsettings` need to be in INSTALLED_APPS.

Thanks to Dirk Eschler for spotting.
Add FR translation and fix translation files headers.
Add ES translation.
Update README, AUTHORS, language tests.