Update README file.

README.md

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-# Balloons JS
+# balloons.js
 
 An event-based JavaScript library to build front-end components or widgets.
+
+## API
+[WIP]
+
+## Development setup
+1. Install [Git](http://git-scm.com/) and [NodeJS](http://nodejs.org/).
+2. Open your terminal and clone `balloonsjs/balloons` by running:
+
+        $ git clone [email protected]:balloonsjs/balloons.git
+
+3. Now go to the project's folder:
+
+        $ cd balloons
+
+4. Install its dependencies:
+
+        $ npm install
+
+5. Install `grunt-cli`:
+
+        $ npm install grunt-cli -g
+
+6. Run grunt tasks:
+
+        $ grunt
+
+7. Develop! :)
+
+**NOTE**
+
+Please read through our code style guides:
+- [HTML](https://github.com/mercadolibre/html-style-guide)
+- [CSS](https://github.com/mercadolibre/css-style-guide)
+- [JavaScript](https://github.com/mercadolibre/javascript-style-guide)
+
+## Maintained by
+
+- Her Mammana ([@hmammana](https://twitter.com/hmammana))
+- Lean Linares ([@lean8086](https://twitter.com/lean8086))
+- Guille Paz ([@pazguille](https://twitter.com/pazguille))
+
+## Credits
+
+![MercadoLibre](http://static.mlstatic.com/org-img/chico/img/logo-mercadolibre-new.png)
+
+## License
+Licensed under the MIT license.
+
+Copyright (c) 2013 [MercadoLibre](http://github.com/mercadolibre).