deleted vaadin addon repo and snapshot repo (2x)
removed vaadin plugins for maven from pom.xml. We don't need theme compilateion and widgetset compilation hookups in this hello world example
switched mortbay jetty to eclipse jetty and latest release
reordered pom.xml a bit
removed @PreserveOnRefresh
fixed code formatting in pom.xml
Merge pull request #1 from Peppe-/master

Cleaned up pom.xml. Some might think too heavily. Please review.