Revert "Debian packages: removed /var/log/$project.name directory"

This reverts commit 01d5daff96622ecf7ff8cb13259ec8a6620f6b76.
Revert "Removed redundant directory in /var/log for Debian packages #294"

This reverts commit 107ad4d123414bcd807301c9e4d1eb27e1b0cdec.
Stop Gateway service before uninstalling, create extra user for daemon (#299, #300)