add test to demonstrate issue with markdown extension parsing. adding mkd as an extension should not cause mkdn files to also be markdownified
force markdown match to match the full extension
It's WordPress - capital P, dang it.

WordPress, like GitHub, is a camel-cased name that deserves to be
written properly. Props to @jeremyvisser for pointing this out.

Closes #1384
Merge pull request #1382 from torsneyt/fix_md_ext

Markdown extension matching matches only exact matches
Update history to reflect merge of #1382
Fix 'undefined method `gsub' for nil:NilClass' when undefined method is called.

Closes #1388.
http://stackoverflow.com/questions/18037596/error-undefined-method-gsub-for-nilnilclass/18038912
Update history to reflect closing of #1388.
Remove div.container from the default html template
Align {{ content }} call with its siblings in site template.
Update history to reflect merge of #1315