nova-kvm: configure /etc/sysconfig/libvirtd

Adds the --listen option to the /etc/sysconfig/libvirtd file.
This would be required for migrations on distributions that use
this file.

This commit also fixes an issue w/ a21a2e7 where the debian
style file was copied into place on *all* distributions.
We should avoid writing unnecessary files to disk where
possible. As part of this fix the file was moved from being
configured w/ os-config-apply into the install.d. It is unlikely
these files will change often so I think this is Okay...

Change-Id: I3725897744c13184d72475e137ff9267ee5449fc
Closes-bug: #1279356
Fixes links in README.md

Fixes a broken links, and changes download links to point to
git.openstack.org rather than github.

Closes bug 1282919

Change-Id: I51ef077bb0bab7d684ae499bf6562fc590b4c660
Glanceclient now needs libffi-dev to install.

Change-Id: Iaf8533a5a56f33e10f1cdd470b86022d630240cf
Run neutron-db-manage on reset-db.

This is not documented in any of the manuals but is showing up in
upgrade wiki pages.

Change-Id: I4999bff2bf348551f419f03bc2815c589026eea6
Merge "nova-kvm: configure /etc/sysconfig/libvirtd"
Merge "Run neutron-db-manage on reset-db."
Merge "Fixes links in README.md"
Configure horizon when using /etc/apache2.

The horizon image element doesn't appear to work when the http server
uses the /etc/apache2 directory.

Fix up one incorrect symlink, add one more, and remove default config
files which might obscure horizon on port 80.

Change-Id: I6427de66f73a5853a80ea75d753218172a078d9d
Closes-bug: 1281703
Merge "Configure horizon when using /etc/apache2."