Merge pull request #142 from TomLottermann/master

German translation for django_notify and German wiki translation fixes
Merge pull request #143 from TomLottermann/master

Icon fix on delete page
fix SimplePlugin constructor - pull #144
Merge branch 'master' of github.com:benjaoming/django-wiki
remove pip --use-mirrors
less blahblah on the contribution stuff
Markdown needs to be >2.2.0 due to 2.1.1 headerid extension tested broken with newer ElemenTree versions
Add attr_list to allow e.g. custom Header ids for custom references to header sections
lock main article in the test project
font size in blockquotes
add back anon read access to test main article
Make the urlize parser more strict
Update README.md
Merge remote-tracking branch 'upstream/master'