Added instructions to install in a Rails 3 app.

README.rdoc

@@ -1,10 +1,24 @@
 = Princely
 
-Princely is a simple wrapper for the Prince XML PDF generation library 
-(http://www.princexml.com). The plugin will also automatically registers 
-the PDF MimeType so that you can use pdf as a format in controller 
+Princely is a simple wrapper for the Prince XML PDF generation library
+(http://www.princexml.com). The plugin will also automatically registers
+the PDF MimeType so that you can use pdf as a format in controller
 respond_to blocks.
 
+== Rails 3 Install
+
+Add to your Gemfile:
+
+    gem 'princely'
+
+Run:
+
+    bundle install
+
+And create an initializer in config/initializers/princely.rb:
+
+    require 'princely/rails'
+
 == Example
 
     class Provider::EstimatesController < Provider::BaseController
@@ -14,14 +28,14 @@ respond_to blocks.
         respond_to do |format|
           format.html
           format.pdf do
-            render :pdf => "file_name", 
+            render :pdf => "file_name",
                    :template => "controller/action.pdf.erb",
                    :stylesheets => ["application","prince"]
                    :layout => "pdf"
           end
         end
       end
-      
+
       # Alternatively, you can use make_and_send_pdf to
       # render out a PDF for the action without a
       # respond_to block.