Tidy load order and logic.
Tidy port reference for info.

Inject bind address info into the state.
Expose keyspace in info command response.
State extends event emitter.
Include expired keys in info stats.
Emit rejected event.
Fix pubsub test spec.
Fix input/output bytes logic.
Allow empty dbfilename.

When it is the empty string the server will not load the db file at boot
time.
Fix config file argv[2] issue.

Do not print db load info when dbfilename is the empty string.
0.1.52
Update readme.