Put CONTRIBUTING in its own file

CONTRIBUTING.md

@@ -0,0 +1,24 @@
+# Contributing
+
+To set up the development environment, install the dependencies with npm and
+bower:
+
+```bash
+npm install --dev
+bower install --dev
+```
+
+Start the development server that transpiles the module as you modify them:
+
+```bash
+grunt server
+```
+
+Make sure to test your changes and run `grunt test` to run the suite in
+PhantomJS, Chrome and Firefox. Your code should follow the fit the style of the
+project, which is roughly based on
+[Crockford's white space rules](http://javascript.crockford.com/code.html).
+
+When done with your changes, push them to a feature branch, open a [pull
+request](http://github.com/passy/hyperagent.js/issues/) and enjoy our infinite
+gratitude.

README.md

@@ -1,7 +1,9 @@
+<div class="intro">
 # hyperagent.js
 
 hyperagent.js is a JavScript library for consuming [HAL] hypermedia APIs in the
 browser.
+</div>
 
 ## Compatibility
 
@@ -299,31 +301,6 @@ callback-based API.
   [RFC6570]: http://tools.ietf.org/html/rfc6570
   [HAL]: http://tools.ietf.org/html/draft-kelly-json-hal-05
 
-## Contributing
-
-To set up the development environment, install the dependencies with npm and
-bower:
-
-```bash
-npm install --dev
-bower install --dev
-```
-
-Start the development server that transpiles the module as you modify them:
-
-```bash
-grunt server
-```
-
-Make sure to test your changes and run `grunt test` to run the suite in
-PhantomJS, Chrome and Firefox. Your code should follow the fit the style of the
-project, which is roughly based on
-[Crockford's white space rules](http://javascript.crockford.com/code.html).
-
-When done with your changes, push them to a feature branch, open a [pull
-request](http://github.com/passy/hyperagent.js/issues/) and enjoy our infinite
-gratitude.
-
 ## License
 
 Licensed under MIT