Commits on Feb 19, 2016

1. Check if we can write to files, instead of checking if we are root …

   In theory this lets us operate without being root, although with apt we
   still have hardcoded paths.

   Iain Lane committed Feb 19, 2016
   9d455dd

2. 50appstream: Don't run if we can't write to the system paths

   Iain Lane committed Feb 19, 2016
   d498c6c