rewrite ASU with Redis

Instead of using a huge PostgreSQL database and literally downloading
every ImageBuilder possible on a daily basis this now uses some merged
JSON files and archives nearly the same thing.

The upgrade check capabilities are not yet fully implemented but the
basics work.

Signed-off-by: Paul Spooren <mail@aparcar.org>

Author: aparcar

.codacy.yml

@@ -1,20 +1,11 @@
-ansible/*.retry
-ansible/host_vars/
-ansible/ansible.cfg
-ansible/hosts
-asu.egg-info/
-build/
-dist/
-tests/
-./distributions/
-.coverage
-.vagrant/
-*.swp
-*.log
-*.pyc
-updater/
-worker/
-download/
-gnupg/
-keys/
-**/__pycache__/
+!\.gitignore
+\.*
+asu/__pycache__/
+bin/
+cache/
+lib/
+lib64
+pyvenv.cfg
+share/
+store/
+var/