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

Make travis validate json

bug fix to PR #21: fixed variable names not committed

As of writing there is no 'latest' (hashicorp/packer/issues/5265)

I'm sorry, I didn't double check what's staged and thus didn't commit fixed
variable names: 'iso_checksum' -> 'iso_checksum_url'