Add SlashNewlineStrippingTemplateLoader

This will be the end of long lines in templates!

In a template, you can now end a line with \.  Then the newline is
automagically removed before it is rendered.

NOTE This requires changes to settings.py

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Merge pull request #142 from khandhas-infra/template-breaklines

Add SlashNewlineStrippingTemplateLoader
Only show searchbox when authenticated

Signed-off-by: Bas Westerbaan <bas@karpenoktem.nl>
anonymized-dump: bugfix

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Merge branch 'master' of https://github.com/karpenoktem/kninfra