This commit rename the tarball, debian, ubuntu and fedora packages.

This commit also modify the debian post install script to add support
our repositories for Debian 10 and Ubuntu 18.10 and 19.04 and create
transition packages to ensure a proper nama transition in debian based
distributions.

Warning: when using reprepo to add the ring transition deb package
this get into pool/main/j/jami. for now we think is a reprepo error
because reads the Source: instead of Package: field.

Change-Id: I47449a79c1a8bfd6ee0f3ffed618886f1dc1645a

Change-Id: I5b89c33b6fb8b85df3307d517c0d55e35c5f02e2

It has been decided that we would have different releases between
website and apt repository. The version from the website would have
debian revision -0 and the one from apt repositories -1.

The main difference resides in the fact that the version from the
website distributes a postinst script which installs key and apt
source.list so that Ring gets automatically updated when installed
via one click install. This is not the case with the one from apt
repos.

Change-Id: I7bbfdfa41b0133ebe93f16bc550aa437c8ddfa6a

This moves the official Debian packaging into ring-project. Jenkins
should now be able to run packaging jobs and publish packages. It
should also make it easy to add a `verify` check on Jenkins to test
packaging patches.

This will make it much easier to work on packaging issues because the
build environment is now reproductible on any machine.

The patch adds Makefile targets to create packages such as:
 - package-all
 - package-<DISTRO>

Builds are all done inside Docker containers and it is possible to
build many at a time with the `package-all` target.

To debug a build, use `package-<DISTRO>-interactive` to obtain a shell
inside a container, ready to launch a build.

Tuleap: #781
Change-Id: Id87a74a6c412ffc5bf82b9562639ce5a9424b06a