* added python script to increase failure-tolerance

Signed-off-by: Christian Rebischke <chris@nullday.de>

* removed try & except block at beginning

Signed-off-by: Christian Rebischke <chris@nullday.de>

* refactored if blocks

Signed-off-by: Christian Rebischke <chris@nullday.de>

* reduce redundancy by templating packer cmd (#45)

* reduce redundancy by templating packer cmd

* copy list to allow repeated calls to build_packer_call

without this, build_packer_call will modify PACKER_CMD_TEMPLATE unintentionally

* actually call build_packer_call

Replace Atlas Cloud with Vagrant Cloud.

This reverts commit 247c2bc9.

This reverts commit 81fc8e1a.

fixed #34

systemd is checking for xorg now, when trying to apply `localectl
set-x11-keymap`. So we just remove that line (we are not shipping boxes
with X11 either)

We have also updated the date for the local.json example file

Signed-off-by: Christian Rebischke <chris@nullday.de>

travis: get latest packer release with the help of hashicorp api

travis: fix double quotes

travis: no need of echo for export variables

travis: fix typo

travis: fix packer unzip

travis: pull the version via curl just once, and compare fingerprint before importing key

travis: fix gpg command line, since travis run under ubuntu 14.04

We need to re-initialize the pacman keyring for every machine,
otherwise every machine would have the same pacman master key. The same
pacman master key opens the possibility for Mitm-attacks.

Signed-off-by: Christian Rebischke <Chris.Rebischke@posteo.de>

Signed-off-by: Christian Rebischke <Chris.Rebischke@posteo.de>

The rankmirrors tool is not part of the official arch linux ISO
anymore.. Furthermore I don't think it has so much effect

added travis-ci icon