Mobile nav fixed.

Now shows links instead of 'undefined'.
Fixed GitHub jsonp call. Closed #1118
Merge pull request #1116 from peterboni/patch-1

Mobile nav fixed.
added config_tag plugin for integration of configuration into templates
Improved: config_tag plugin is much more flexible now and can be used by other plugins directly through the config_tag method
Added sass-globbing, allowing plugin stylesheets to be auto-imported from the assets/stylesheets/plugins directory
fixed addSidebarToggler where index and section were flip-flopped
fixed mobile navigation
fixed video wrapping js
Allowing dashes in code names. Closes #1166
Accepting all non-whitespace characters as language names for Pygments code highlighting
Added support for deploying to github.io
Sinatra now correctly returns code 404 when a page is not found. Closes #1198
Updated RDiscount, added footnotes and other extensions
Removed a couple of buggy filters on RDiscount (for now)
Footnotes styling updates
Recent posts sidebar now correctly observes titlecase settings
Added !default to $img-border
add https protocol supporting during rake setup_github_pages
Adjusted JsFiddle plugin to detect jsFiddle versions.

Prior to this change, {% jsFiddle ccWP7/5 result,js,html %} wouldn't
render the desired tab order properly since the regex pattern was
being capturing the /5 as part of the first of the tabs.