Update installing instructions

Author: rosenfeld

README

@@ -0,0 +1,33 @@
+Console
+=======
+
+A Rails 3 engine for running Ruby scripts on the browser in the context of a controller action.
+
+You can install it as a gem or putting it in your vendor/plugins/console directory.
+
+Installing as a Gem (preferred method)
+-------------------------------------
+
+In your Gemfile, put the dependency like this:
+
+<pre>
+gem 'rails-web-console', :require => 'console', :group => :development
+</pre>
+
+If you intend to use this in production environment (strongly discouraged), be sure to protect console routes. Do it on your own risk!
+
+Installing with a clone
+-----------------------
+
+Just put it in your vendor/plugins/console. For instance:
+
+<pre>
+git submodule add git://github.com/rosenfeld/rails-web-console.git vendor/plugins/console
+</pre>
+
+Usage
+-----
+
+Just access "/console" in your browser.
+
+Copyright (c) 2010 [Rodrigo Rosenfeld Rosas], released under the MIT license