Update packaging for 4.0.4

* Fix main version (Don't use spaces and capitals in versions!)
* Change debian changelog format in hscommon
* Fix build cleanup
* Switch to XZ compression
* Update build instructions
* Build single package for both Debian/Ubuntu
* Update packaging

pkg/debian/compat

@@ -1 +1 @@
-7
+9

pkg/debian/control

@@ -1,10 +1,12 @@
 Source: {pkgname}
 Section: devel
 Priority: extra
-Maintainer: Virgil Dupras <hsoft@hardcoded.net>
+Maintainer: Virgil Dupras <hsoft@hardcoded.net>, Eugene San (eugenesan) <eugenesan@gmail.com>
 Build-Depends: debhelper (>= 7), python3-dev, python3-setuptools
 Standards-Version: 3.9.2
-Homepage: http://www.hardcoded.net
+Homepage: https://dupeguru.voltaicideas.net
+Vcs-Browser: https://github.com/arsenetar/dupeguru
+Vcs-Git: https://github.com/arsenetar/dupeguru.git
 
 Package: {pkgname}
 Architecture: {arch}

pkg/debian/source/format

@@ -0,0 +1 @@
+3.0 (native)

pkg/debian/source/options

@@ -0,0 +1 @@
+compression = "xz"