DEB package support: move to contrib

Since DEB packages have seen much update in the last releases, instead
of pointing to very old and innacturate releases, let's move those to
contrib.  While at it, let's document what is officially distributed
and what's best effort (contrib level).

Signed-off-by: Cleber Rosa <[email protected]>

docs/source/GetStartedGuide.rst

@@ -9,14 +9,15 @@ The first step towards using Avocado is, quite obviously, installing it.
 Installing Avocado
 ==================
 
-Avocado is available in RPM packages for Fedora, and `DEB packages for Ubuntu`_.
-
-.. _DEB packages for Ubuntu: https://launchpad.net/~lmr/+archive/avocado
+Avocado is officially available in RPM packages for Fedora and
+Enterprise Linux.  Other RPM based distributions may package and ship
+Avocado themselves.  DEB package support is available in the source
+tree (look at the ``contrib/packages/debian`` directory).
 
 .. Note: the following text should instead reference the distro tiers levels
 
 Avocado is primarily being developed on Fedora, but reasonable efforts
-are being made to support other platforms such as Ubuntu.
+are being made to support other GNU/Linux based platforms.
 
 Fedora
 ------
@@ -38,16 +39,6 @@ such as CentOS, just adapt to the following URL and commands::
     sudo curl https://repos-avocadoproject.rhcloud.com/static/avocado-el.repo -o /etc/yum.repos.d/avocado.repo
     sudo yum install avocado
 
-
-Ubuntu
-------
-
-You can install Avocado by running the following commands::
-
-    sudo echo "deb http://ppa.launchpad.net/lmr/avocado/ubuntu utopic main" >> /etc/apt/sources.list
-    sudo apt-get update
-    sudo apt-get install avocado
-
 Generic installation from a GIT repository
 ------------------------------------------