Mac Compatibility and Ability to Change Paragraph Size

I added the ability to cross compile apps for both OS X and iOS with the same library. Also, it will default to the old behavior if unspecified, but if you want to change the width of the paragraph, you are able to do so.

I am thinking about merging this into my SKUtilities project for a bit of consolidation. I know the license says it'd be okay, but if you have feelings either way, I will respect that. I don't know if there's a way to message me built into GitHub, so you can contact me at michael@secretgamegroup.com

Hope you enjoy the changes!