Separate module for SVG properties?

[marick]

Re: SVG height and width attributes #27

Stumbled over this again after a long break from animations (and because both Chrome and Safari will interpret a height style as an attribute).

Perhaps it would best to separate SVG attributes/styles from HTML ones? (Keeping the current ones in Animation for backwards compatibility?)

There's a note in #27 about producing both style and attribute values. I think I'd prefer the separate modules to reduce the chance that I'll once again accidentally use something that applies to HTML thinking it applies to SVG.