0.0.1: Fix highlighting issues.

In addition:

* Add "lexical-binding".
* Add more tests.
* Remove internal Rakefile.

Branch for GitHub

git-svn-id: https://dropofthesun.com/svn/emacs/repos/ruby-extra-highlight/branches/github@2524 c1af6f96-8016-4733-90a2-447896f46de0