1.2.1

Includes performance updates and fixes a visual glitch.

Note: this causes a minor API change for a seldom used feature. Those using AnchorJS to render their own custom icon-font icons will need to pass in Octal JS-friendly codes (like \ue9cb) instead of numeric HTML-friendly codes (like &#xe9cb). See http://bryanbraun.github.io/anchorjs/#icon-font for more information.