extract consul api port to method
rename params, the node name is the dns_name desired in dockerizeit
create consul container when don't exists and wait until the consul is ready
new service to initialise/update the whole DNS entries
add missing gem
stopped containers return an empty address
start the consul container when is not running
fix for empty catalogs reported as nil instead of empty
Merge remote-tracking branch 'origin/master' into keyword_arguments

Conflicts:
	lib/service/dns.rb
Use Combi 0.1.0, required for keyword arguments