script divided into: script AND after_success

o script block/part now does *only* compilation/build and local install (into ~/.m2/repository) and
o the newly added after_success block now does the deployment into a remote maven repo (ala-wonder.it.csiro.au/nexus); TRAVIS_PULL_REQUEST (an env var set by travis-ci.org is used to prevent deployment form/after successful pull-requests builds, because a fork-ed pull-request build does *NOT* have access to the encrypted usernames, passwords, etc.)