Updating documentation for Console. Now mentioniing sandbox and including a...

Updating documentation for Console. Now mentioniing sandbox and including a link to the irb section in the online Pickaxe.

railties/README

 == Welcome to Rails
 
-Rails is a web-application framework that includes everything needed to create 
-database-backed web applications according to the Model-View-Control pattern. 
+Rails is a web-application framework that includes everything needed to create
+database-backed web applications according to the Model-View-Control pattern.
 
 This pattern splits the view (also called the presentation) into "dumb" templates
 that are primarily responsible for inserting pre-built data in between HTML tags.
@@ -131,7 +131,7 @@ and also on programming in general.
 
 Debugger support is available through the debugger command when you start your Mongrel or
 Webrick server with --debugger. This means that you can break out of execution at any point
-in the code, investigate and change the model, AND then resume execution! 
+in the code, investigate and change the model, AND then resume execution!
 You need to install ruby-debug to run the server in debugging mode. With gems, use 'gem install ruby-debug'
 Example:
 
@@ -163,13 +163,20 @@ Finally, when you're ready to resume execution, you enter "cont"
 
 == Console
 
-You can interact with the domain model by starting the console through <tt>script/console</tt>.
-Here you'll have all parts of the application configured, just like it is when the
+The console is a ruby shell, which allows you to interact with your application's domain
+model. Here you'll have all parts of the application configured, just like it is when the
 application is running. You can inspect domain models, change values, and save to the
 database. Starting the script without arguments will launch it in the development environment.
-Passing an argument will specify a different environment, like <tt>script/console production</tt>.
 
-To reload your controllers and models after launching the console run <tt>reload!</tt>
+To start the console, just run <tt>script/console</tt> from the application directory.
+
+Options:
+
+* Passing the <tt>-s, --sandbox</tt> argument will rollback any modifications made to the database.
+* Passing an environment name as an argument will load the corresponding environment.
+  Example: <tt>script/console production</tt>.
+
+More information about irb can be found at link:http://www.rubycentral.com/pickaxe/irb.html
 
 == dbconsole