Upgrade to font-awesome 3.0.1

Font-awesome v3.0.1 was released today.

This release fixes the icon alignment issues that v3.0.0 saw, especially against twitter bootstrap.

I also took the liberty of changing the versioning scheme to more closely follow font-awesome's versioning, but I broke that out into it's own commit in case you disagree with this versioning scheme.

This also includes a new `font-awesome-ie7.min.css`, because that is the only copy Font-Awesome core keeps around anymore, but I kept `font-awesome-ie7.css` for backwards-compatibility. The latter is just a direct copy of the minimized former however.