Internationalization support.
Add tests for model render methods
Refactor l10n

Eliminate django-crontabs dependency
Add tests
Replace RichTextContent with localizable RichTextEntry
Put l10n comments above each string

fix flake8
Merge pull request #9 from jgmize/l10n2

L10n
Use default settings.JINGO_EXCLUDE_APPS

See fix for https://github.com/jbalogh/jingo/issues/22
Merge pull request #18 from jgmize/default-jingo-exclude

Use default settings.JINGO_EXCLUDE_APPS
Copy tree admin action.

Allow users to copy a tree of pages from the admin panel.