Update plugins and dependencies.

Changed to use Jacaco for code coverage.
Removed the use of SNAPSHOT versions.

The pom.xml is cleaned up with cleanpom-maven-plugin.
Remove sonar invocation

PermGenSpace error when executing Sonar from maven-archetype-plugin
Updated README.md and linked to site
Applied cleanpom XSLT and add site distribution
squash! Applied cleanpom XSLT and added additional links

Added site distribution information and SCM URL