LMS-1264 DSU tracking system: introduce dto package

deep_sequencing_unit/etc/tracking-service.properties

deep_sequencing_unit/resource/DSU TrackingClient.launch

...a/ch/ethz/bsse/cisd/dsu/tracking/dto/TrackedEntities.java

.../ch/ethz/bsse/cisd/dsu/tracking/dto/TrackingStateDTO.java

...sd/dsu/tracking/email/EntityTrackingEmailDataManager.java

...cisd/dsu/tracking/email/EntityTrackingEmailGenerator.java

...isd/dsu/tracking/email/IEntityTrackingEmailGenerator.java

...thz/bsse/cisd/dsu/tracking/main/FileBasedTrackingDAO.java

...ava/ch/ethz/bsse/cisd/dsu/tracking/main/ITrackingDAO.java

.../java/ch/ethz/bsse/cisd/dsu/tracking/main/TrackingBO.java