Update to new soledad package scheme.
Migrate mx to work with the new couchdb structure and views
Merge remote-tracking branch 'chiiph/bug/migrate_couch' into develop
Merge remote-tracking branch 'drebs/feature/3487-split-soledad-into-common-client-and-server' into develop

Conflicts:
	src/leap/mx/mail_receiver.py
Use the right database
Merge remote-tracking branch 'chiiph/bug/use_identities_in_tac' into develop
Versioneer all the things!
Merge remote-tracking branch 'kali/feature/improve_packaging' into develop
Fold in changes