Implement NsqCluster.block_until_running, which blocks until the NSQ cluster is fully launched.
Remove superfluous comma.
Use a more sane 3-second timeout.
Add blocking to executable for command output pre and post launch.
Version bump to 0.2.0
Document blocking functionality in README.
Merge branch 'rg-blocking-wait-for-launch'

Conflicts:
	Gemfile.lock