d/g-d-w.sh: switching the JRE usage dynamically

If the gridvis.conf gets a 'jdkhome = jre' this means we want to use the
preshipped JRE from the package, mostly needed to run the GridVis-Desktop
probably with the shipped Java version.
debian/rules: fix package-contains-timestamped-gzip

Lintian complains about files with timestamps. Fixed up by using -n on
the gzip command.
debian/rules: removing dh_shlibdeps for now

The jre/ folder contains prebuilded statically librarys and exceutables,
so there is currently no need for dh_shlibdeps to collect various
dependencies.
debian/rules: adopting changes related to the jre/ folder
lintian: adding some more overrides

Due the preshipped JRE inside the package lintian is complaining about a
lot of warnings and errors. These are useless as the complete JRE folder
is independed from the running debian system.