Improve usage in README

[ryanoff]

Can you please improve the Usage area in the Readme file?

I believe for Rails 3.1 by default it uses Coffeescript and SCSS.

For example, if our controller is called Projects:

In projects.js.coffee, add the line
//= require jquery-star-rating

In projects.css.scss, add the line
/*
*= require jquery-star-rating
*/

In our view (e.g. new.html.erb) add the "star" class to your radio buttons:
<%= f.label :rating, "Rating" %>
<%= f.radio_button :rating, "1", :class => "star" %>
<%= f.radio_button :rating, "2", :class => "star" %>
<%= f.radio_button :rating, "3", :class => "star" %>
<%= f.radio_button :rating, "4", :class => "star" %>
<%= f.radio_button :rating, "5", :class => "star" %>