Create ubuntu-12.04 and ubuntu-14.04 directories in appliance.

Turns out scripts/*.sh, pressed.cfg cannot be shared. :(
enter the commit message for your changes. Lines starting

And change accordingly globaleaks_*.deb path.
In setup.py test command, exit with returncode > 0 if any test was failing.

Exit from `python setup.py test` in the same way as `trial` does.
Revert "added monkeypatch for Storm 0.19 and foreign keys handling"

This reverts commit 133a3815a30597c74385bf5559a43006703c52bb, and
commit 675ac8a757e237441b244bed3915a234273ce5cb.
Add scripts stolen from random packer template for ubuntu 12.04.

And update template.json accordingly.
Tune dependencies for ubuntu 12.04.

* Add -dev packages for libraries requiring header files during pip
 installation.
Reaching a working packer build for ubuntu 12.04.

* Work around an "Hash-Sum mismatch" error on apt-get update by removing
 /var/lib/apt/lists/*. Looks like a bug on the ubuntu side:
 <https://github.com/mininet/mininet/issues/438>
* Install VBox Guest additions just as we do in ubuntu 14.04, and remove the
  file immediately (not in cleanup.sh)
* Fix VBox Guest additions installation fuckup (missing automake to compile
   modules apparently)
* Add globaleaks.sh script for ubuntu 12.04.
* Add virtualbox.sh and globaleaks.sh scripts to packer