Make UTF-8 the default file encoding
Make UTF-8 the default file encoding

Follows Ruby 2.0 convention, should not affect other versions.

Closes #607

thomthom/yard,herosky/yard,ohai/yard,thomthom/yard,iankronquist/yard,jreinert/yard,amclain/yard,herosky/yard,alexdowad/yard,alexdowad/yard,alexdowad/yard,herosky/yard,amclain/yard,ohai/yard,lsegal/yard,jreinert/yard,iankronquist/yard,ohai/yard,amclain/yard,jreinert/yard,iankronquist/yard,lsegal/yard,lsegal/yard,thomthom/yard