Upated readme file with build info.

README.md

@@ -8,6 +8,32 @@ Chosen is a library for making long, unwieldy select boxes more user friendly.
 For documentation, usage, and examples, see:  
 http://harvesthq.github.com/chosen
 
+### Contributing to Chosen
+
+Contributions and pull requests are very welcome. Please follow these guidelines when submitting new code.
+
+1. Make all changes in Coffeescript files, **not** JavaScript files.
+2. For feature changes, update both jQuery *and* Prototype versions
+3. Use 'cake build' to generate Chosen's JavaScript file and minified version.
+4. Update VERSION file according to [Semantic Versioning](http://semver.org/) guidelines.
+5. Submit a Pull Request using GitHub.
+
+### Using CoffeeScript & Cake
+
+First, make sure you have the proper CoffeeScript / Cake set-up in place.
+
+1. Install Coffeescript: the [CoffeeScript documentation](http://jashkenas.github.com/coffee-script/) provides easy-to-follow instructions.
+2. Install UglifyJS: <code>npm -g install uglify-js</code>
+3. Verify that your $NODE_PATH is properly configured using <code>echo $NODE_PATH</code>
+
+Once you're configured, building the JavasScript from the command line is easy:
+
+    cake build                # build Chosen from source
+    cake watch                # watch coffee/ for changes and build Chosen
+    
+If you're interested, you can find the recipes in Cakefile.
+
+
 ### Chosen Credits
 
 - Built by [Harvest](http://www.getharvest.com/)