Add initialisation state for single node setup
Add initialisation state for single node setup

CouchDB does not initiate system databases on startup. State
couchdb2.single_node_init should take care of that. More info:
http://docs.couchdb.org/en/2.0.0/install/index.html#single-node-setup

Signed-off-by: Michal Kuffa <005ee1c97edba97d164343c993afee612ac25a0c@gmail.com>

Couchberry/couchdb2-formula