This remove support for Django 1.5 and Django 1.6

Not much new stuff added, but here is the list of changes:

• Migrations for Django 1.7 and 1.8 added by @mjaworski
• Refactored test suite and travis.yml this will allow to improve our coverage for the future releases and the tests are now being run against Django 1.5 and 1.6 properly (before we had 0 test running).

That's all folks!

Support for Django 1.8

• Add python3 support
• Add widget docs
• Improvement of README (coveralls, and travis badges added too)
• Add widget customization to TranslationInlineForm

Includes:

• Command for generate all the missing translations
• AutomaticTranslation model for call save everytime the model is save in order to generate the translations