Fbxat

* Use augeas for pagekite config
  * You have to copy the lens of https://github.com/hercules-team/augeas/pull/153 into your lense folder (i.e. /usr/share/augeas/lenses/dist)
* Adaptions for freedombox.me voucher in firstboot
* Use bootstrap3 for the layout
  * the bootstrap3 files are manually included for now -- this will change as soon as the bootstrap3 debian package is available