* 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)
Also added the watchdog-kick package:
Some devices (namely Nokia N9/950) use more than one watchdog, and
watchdog-kick package kicks all of /dev/watchdogs? every 10 seconds so
they don't reset the device