Refreshed certificates which expired.

New one should last 10 years.
Fix medium tests in using server name

* Seems that sbuild doesn't need localhost resolution, so use server name, as
  it's what's resolved by the docker container
* Update instructions to generate the certificates
Enhance tests by adding more info in case of fail

* Add another parameter to give more info for equality len checking in case of
  a failure
* Remove an already covered in other test case (matching name)
Checkpoint of running docker inside autopkgtests

* Still WIP (just a checkpoint), having some weird Permission denied issues
  inside the chroot. Just check in to stash it for now.
Disable medium tests in autopkgtests for now
Integrate automated i18n merge support

* Switch from babel to direct command usage.
* Override commands to run those commands. Add "update_pot" target to update
  the template file.
* Update requirements.
New template file refresh with new build system
Add fr and zh_CN translations.
Fix some pep8 failures in setup.py
releasing package ubuntu-developer-tools-center version 0.0.4
Switch to use schema_id to fix deprecation

* GSettings:schema has been deprecated and 14.10 shows a warning about it.
  Fix the deprecation by switching to schema_id which is supported in 14.04.