Bump rake to 10.4.
Update uglifier to 2.6.
Update Jekyll to 2.5.
Update bundle.
Update highlightjs to 8.4.
v2.4.1
Update mini_magick to 4.0.1.
Update jQuery to 2.1.2.
Update Foundation to 5.0.0.
Update asynchronous Gist script.
Update jQuery to 2.1.3.
v2.5.0
Merge branch 'master' into demo