move debian/ubuntu documentation, scripts and resources from internal repo to public one

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7481 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #7021 - enable fullscreen with OS X

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7482 0c6e7542-c601-0410-84e7-c038aed88b3b
see #10455 - cross-platform UI tuning to avoid waste of space with platform-dependant native layouts (seen on OS X)

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7483 0c6e7542-c601-0410-84e7-c038aed88b3b
see #10455 - use OS X Window-Modified Indicator with `Window.documentModified`

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7484 0c6e7542-c601-0410-84e7-c038aed88b3b
see #10455 - OS X: show correct dock icon if run with `java-jar`

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7485 0c6e7542-c601-0410-84e7-c038aed88b3b