Add Debian packaging

My first Debian package, woo! :-)

debian/calls.docs

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+README.md

debian/changelog

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+calls (0.0~gite815677) UNRELEASED; urgency=low
+
+  * Initial release.
+
+ -- Bob Ham <rah@settrans.net>  Wed, 23 May 2018 14:06:02 +0100

debian/compat

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+11

debian/control

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+Source: calls
+Section: comm
+Priority: optional
+Maintainer: Bob Ham <rah@settrans.net>
+Build-Depends:
+ debhelper (>= 11),
+ libhandy-0.0-dev,
+ libgtk-3-dev,
+ meson,
+ pkg-config,
+Standards-Version: 4.1.3
+Homepage: https://gitlab.gnome.org/Community/Purism/calls
+
+Package: calls
+Architecture: any
+Depends:
+ ${misc:Depends},
+ ${shlibs:Depends},
+ ofono,
+Description: Make and receive PSTN phone calls
+ A GTK+ user interface for PSTN phone calls using oFono.

debian/rules

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+#!/usr/bin/make -f
+
+export DEB_BUILD_MAINT_OPTIONS = hardening=+all
+
+%:
+	dh $@ -- -B_build

debian/source/format

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+3.0 (native)