Fix do-end block detection regexp

e.g
  form_for [:admin, @message] do |f|
  form_for @message, {:url => msg} do |f|
Add autoloads for rhtml-mode and auto-mode-alist

This allows RHTML to work for package management users without needing
to add (require 'rhtml-mode) to their init.el.

Signed-off-by: Erik Charlebois <erikcharlebois@gmail.com>
Merge pull request #7 from erikcharlebois/master

Add autoloads for rhtml-mode and auto-mode-alist
Merge pull request #3 from eiel/master

Fix do-end block detection regexp