Display a message that the comments are powered by Disqus.

This is useful when JavaScript has been disabled for Disqus, but enabled
for the host domain. Otherwise the visitors get no indication whether
comments are present or not.
Merge pull request #505 from notfoss/disqus-fix

Display a message that the comments are powered by Disqus.
fixes on check plugin
Merge branch 'master' of github.com:ralsina/nikola
fix #510
support schema-relative URLs in checker
Basic template dependency detection for Jinja (Issue #511)
Full dependency scanning for Jinja templates (fixes #511)
updated changelog