Don't let spark spend time figuring out what IP to bind the web server to when executing in local mode
Get rid of kerberos auth testing. No more "Unable to load realm info from SCDynamicStore"! Woo!

See http://stackoverflow.com/questions/7134723/hadoop-on-osx-unable-to-load-realm-info-from-scdynamicstore
Merge pull request #10 from Shopify/fast_local_start

Faster local start