Support line breaks, line-height and alignment

[jvolker]

@techninja

I'm probably going to extend this awesome package for my own purposes in the near future to support line breaks, line-height and alignment and improve other things. I wouldn't mind sending a PR with my results. Is this something you are interested in?

Also to make this a bit easier I would prefer to remove fs as a dependency and remove reading from JSON as mentioned in #6. I'm mainly targeting the browser and prefer to use the updated SVG fonts. Would you support going that direction?