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since the url that changes the user session language was moved in webproject
as an app wide url, the view that gets bind to the url should exist also
in webproject.

- Skip entry points for python distributions names existing in
  ``SYNNEFO_EXCLUDE_PACKAGES`` environmental variable
- Avoid duplicate entries in list setting objects

Update fabfile, add "dchall" command to produce Debian
changelog entries for all Debian packages.

Refs #1986

A DB migration is required.

So that glance image service can fallback to the old compute images api
for missing image references.

fixed a bug that caused previous/next buttons of vm create view
to disappear.

To override default SKIP_AUTH_URLS setting of cyclades-app so that intro
and about pages can be served

Amend INSTALL_REQUIRES in */setup.py with explicit version numbers
where not previously specified.

Use '>=' comparisons, to avoid console scripts barfing if the
exact same version specified in setup.py is not currently installed
in the system.

dh_python2 does not seem to pass version requirements in the final
deb produced, this is an open bug in Debian:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=653740

Handle version files for projects that are not using the synnefo
namespace

Method name was get_image, not get_meta

Add skeleton for admin's quick install guide and
developer's quick install guide in snf-docs