Plugin is broken when CSP is enabled.

CSP enables an extra security layer on websites by being able to specify where styles and scripts can be loaded. In strict cases, this makes browsers refuse to apply direct changes to the style attribute (i.e. `box.setAttribute('style', '...')`).

WOW looks awesome and light weight, but I wanted to submit this as an issue. I'm working on making it CSP friendly for myself and wanted to see your thoughts on getting it into the plugin itself?

Thanks.