Merge pull request #1 from cyrille-leclerc/master

Enhance demo
Merge pull request #2 from cyrille-leclerc/master

Update web.xml schema location to http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd
Merge pull request #3 from cyrille-leclerc/master

Use a versioned clickstack on AWS S3.
Update clickstart.json
Merge pull request #4 from cyrille-leclerc/master

Make the clickstart visible for documentation purpose
No longer redefine the plugin url, use the default one