Updating on marytts

We have done several changes to the Italian modules, we would like to synchronize the marytts repository to marytts-it.

This pull request includes:

 * commits from psibre not yet included in marytts
 * changes in artifact id  in  marytts-assembly/assembly-builder/pom.xml and marytts-assembly/assembly-runtime/pom.xml as described in Issue #83. 
 * improvement on Italian NLP and text processing

After these commits, we have continued the development of Italian modules but we have modified also others modules, so we need to discuss if you like these other patches should be included in marytts.