Sprucing up the debian folder

[stevenpusser]

The debian/control file list dependencies: libgee-0.8-2, libvte-2.91-0, libjson-glib-1.0-0, libxml2 that the shlibs:Depends variable adds automatically anyway, so those should be removed.

Also, the lists of build-depends and depends in that file extend over 80 characters, which Debian policy doesn't like. It's better to just put those in multiple lines.

Thanks, just packaged it for MX Linux, and it's getting favorable comments!