#158 add configuration for archetype deployment

according to http://maven.apache.org/archetype/archetype-packaging/
the packaging of the maven module has to be 'maven-archetype'. Additionally some plugin configuration is needed. I hope that his is sufficient to get the archetype into the central archetype catalog
Merge pull request #161 from sialcasa/#158_archetype_deployment

#158 add configuration for archetype deployment