ARC conversion. Builds for OS X 10.9 and iOS 7. Uses NSRegularExpression instead of RegexKit[Lite].
Move README so GitHub recognizes it.
README is already Markdown, so mark it as such
Mark all the writing docs as Markdown too
Convert to full Markdown
Fix markdown in readme
Merge pull request #1 from gwynne/master

Update to modern Objective-C and clean up docs a bit