Kitchen Sink archetype overhaul

* Refactored the Kitchen Sink app to use Errai UI Templates and Data Binding
* Updated to the latest JBoss JavaEE spec BOM and the latest JDF BOM
* Updated release docs to explain the process for switching Kitchen Sink to
  a new version of Errai.
This is actually a Markdown file
JBIDE-13159 - gwt-kitchensink fails to deploy - class not found
Merge pull request #10 from snjeza/jbide-13159

JBIDE-13159 - gwt-kitchensink fails to deploy - class not found
Updated to new version 2.3.0.CR1