Update ruby-mode to 2.0.0p247.

Various fixes.

* Added misc/ruby-additional.el for emacs24 support.

* misc/ruby-electric.el (ruby-electric-curlies): Automatically
  indent closing curly brackets when
  ruby-electric-newline-before-closing-bracket is true.

* misc/ruby-electric.el (ruby-electric-curlies): Fix the bug where
  an open curly inserted in a string is always replaced with a
  hash sign.

(taca)