MARMOTTA-510: Streamlining several POMs:
 * Moved dependency-version to the parent-pom:
   - org.tukaani:xz
   - squebi
   - sgwizler
 * Added explicit links to parent poms.
 * Install and deploy the maven-plugins parent-pom.
MARMOTTA-510: Updated License&Notice for new dependencies:
 * JodaTime
 * JsonSmart
MARMOTTA-510: Updated Installer to reflect recent module changes/renamings.