upgraded version of sonar-packaging-plugin
introduced standard to expose extensions and rules via Configuration.java in each module
cleanup: added many @SuppressWarnings
cleanup: added many @SuppressWarnings
cleanup: removed deprecated api usage
cleanup
moved all integration tests to one module and added enforcerTests
cleanup
cleanup: removed deprecated api usage
cleanup: use sonar-plugin-api
Merge branch 'origin/master'

Conflicts:
	modules/sonar-plugin/src/main/java/de/lgohlke/sonar/MavenPlugin.java
	pom.xml