Merge pull request #35 from sbaechler/master

Make navigation extension work with siblings_along_path filter
Auto-fill the "author" field
German translation update
flake8-clean the code (excluding the testsuite)
Merge pull request #36 from matthiask/master

flake8-clean the code (excluding the testsuite)
elephantblog_categories: Only return non-empty categories by default
update locales
Update locale
Merge branch 'feincms-master'

Conflicts:
	elephantblog/locale/de/LC_MESSAGES/django.mo
	elephantblog/locale/de/LC_MESSAGES/django.po
update locale
new locale: fr
rename page pretender URLs due to compatibility with Javascript problems
Merge remote-tracking branch 'sbaechler/master'

Conflicts:
	elephantblog/models.py
	elephantblog/views.py