chore(README): update readme with how to contribute

README.md

@@ -1,8 +1,8 @@
-# \<polymerday\>
+# Polymer Day app
 
-PolymerDay Madrid
+The first event focused on Google's Polymer Library and App's Toolbox in Spain. We dedicate one an a half days to talk about Web Components technology. More than 10 talks from developer who are using Polymer during long time and for real projects.
 
-## Install the Polymer-CLI
+## Install the Polymer Day app
 
 First, make sure you have the [Polymer CLI](https://www.npmjs.com/package/polymer-cli) installed. Then run `polymer serve` to serve your application locally.
 
@@ -36,3 +36,14 @@ $ polymer test
 ```
 
 Your application is already set up to be tested via [web-component-tester](https://github.com/Polymer/web-component-tester). Run `polymer test` to run your application's test suite locally.
+
+## How to contribute
+
+Here are the steps to contribute to the project:
+
+# Choose an unassigned issue or create new one.
+# Fork the repo
+# Create a branch in your repo with the id of the issue (we recomend call the brach like fix/123-issue-name) 
+# Make a pull request to branch master
+# Make sure your fork is up to date [Syncing a fork](https://help.github.com/articles/syncing-a-fork/)
+