Copy Edits on readme.md

I decided to cut out the middle step.  

* Updated the playground copy to make the link more obvious
* I threw in my twitter handle
* 'suck' is not the most professional of terminology, even if writing regexps does suck
* This diff has looks bigger than it really is because I apparently have a text-editor plugin that automatically strips trailing whitespace and one that appends newlines at the end of files.  (I recommend both, but I can disable if you don't want to use those conventions and it becomes a pain)