Added parent CSS class to component to prevent CSS infection

[ajmcgrail]

This should at least alleviate #25, I'm not entirely sure if this fixes the whole issue but I'd be willing to adjust it or have changes made if there were suggestions. But as is, this css isn't scoped and as #25 mentions affects the entire site.

It seems to work when I serve it at least, and in our own site where we use this library, but if there's more stringent testing I can do feel free to let me know.