Updated the RVM configuration to use the latest version of Ruby.
Removed an unnecessary statement specifying the Ruby version and gemset to use. This set up will be handled automatically by the RVM script via the project's .rvmrc.
Gems are now installed at the beginning of the script.
Added options to add a Google Analytics tracking code to the generate documentation and to gzip all HTML, CSS, and Javascript files.
Updated the readme.
Spelled Keates' name correctly.