Rewrite idea

[stevenvachon]

1. Use splitting.
2. Use requestAnimationFrame to apply class names to .char (selector) instead of rewriting the container's innerHTML (which is not performant).

Optional:

• Add duration option, so that animations on content with indefinite length can complete quickly.
• Add staticSize option, which will prevent container dimension changes while animating by not pulling each character out of flow, and instead only hiding them.