* Travis and Coveralls badges
* aports: instead of <https://github.com/postmarketOS>, use
<https://postmarketos.org>
* References to full URLs to issues and pull requests replaced with
a hash and the number
* grsec check: simplify error message, remove link to github issue
(nobody is using that anymore anyway)
* Add nonfree_firmware subpackage to all devices, that depend on
nonfree firmware.
* Some packages were depending on `linux-firmware`, but without having
Wifi working. Removed that dependency as it was probably added by
accident. If it was really necessary, chosing the appropriate
split linux-firmware package (e.g. linux-firmware-brcm) is better
anyway (that has been changed recently in Alpine and is possible
now).
* Add a test case that makes sure we don't have firmware depends
without subpackages in device aports anymore.
* device-*: add postmarketos-base to depends
* aportgen: add postmarketos-base to depends
* Add test case
* postmarketos-base: Don't depend on devicepkg
* msm-fb-refresher: Enable service in post-install
