Antepone vagrant script in order to have a working sudoer.

apt-get update was failing due to user `vagrant` without NOPASSWD.
Use apt-get instead of aptitude in virtualbox.sh script.
Remove superficial `sudo` used in postrm script.
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
It is sufficient to use /bin/sh in vm_cleanup.sh script.
Do not hardfail if the removal of globaleaks configuration is fucked up.

In postrm maintainer script, we attempt to remove globaleaks configuration from
/etc/tor/torrc. There are many reason why this may fail:
* User might be stupid
* Tor might be not present
So here I am just telling dpkg to proceed anyway if something fails. This will
be supposedly be solved once we fix #70 (KEEP IN MIND #962!)
Slim packer scripts, sharing most of them for both ubuntu 12.04 and 14.04.

(I can only test on ubuntu 12.04 now, and it works!)
* Move almost all packer scripts to a shared directory appliance/scripts
* Prefix every executable script with /bin/sh (bash is not necessary for now)
  and run them properly from inside template.json.
* Give more appropriate names to scripts.
Place informative comments around all this pip shitty hack.
Add debian 7.7.0 packer script.

It's working, yay! Fixes #496.
Update ubuntu-14.04 packer scripts to rely on this pip build.