Updated docs
Merge branch 'release/0.39.0'
Added the ability to specify the number of pixels to shift in the URL for /shifting_content and /shifting_content/random
Merge branch 'master' of github.com:tourdedave/the-internet into develop
Added /dynamic_content back in to the examples list. Not sure how it got tossed out.
Updated docs
Merge branch 'release/0.40.0' into develop