Fix file headers and footer for ELPA compatibility

I'm creating a [MELPA](http://melpa.milkbox.net/) recipe for this, and the headers/footers aren't compatible with package.el -- this commit fixes them.

BTW, if you look at the latest version of [flymake-ruby](http://github.com/purcell/flymake-ruby), you'll see that I've simplified it further using my [flymake-easy](http://github.com/purcell/flymake-easy) helpers.