title: GWT Compiler can't find gwt.xml
body: <p>I have changed and renamed my package structure of my GWT project, and when 
  trying to run the project as a web application, the module isn't 
  found and I get the following message:</p>
  
  <blockquote>
    <p>[ERROR] Unable to find 'de/xx/focus/My_Projekt.gwt.xml' on your 
    classpath; could be a typo, or maybe you forgot to include a classpath
    entry for source?<br>
    [ERROR] shell failed in doStartup method</p>
  </blockquote>
  
  <p>Which class is used to load the module, and where to update the new path, respectively? </p>