Added KG Iatrix, et al.

Hi Marco

This branch compiles!
See http://srv.elexis.info/jenkins/view/3.0/job/Elexis-3.0-Base-ngiger/lastSuccessfulBuild/artifact/ch.elexis.base.p2site/target/repository/plugins/
I did a small check of the new plugins and the basic functionality seems okay. Added
* ch.elexis.icpc
* ch.elexis.omnivore
* ch.elexis.externe_dokumente
* org.iatrix