Big changes for 0.5.0

-Cleaned up some of the logging.
-Added some error handling.
-Improved messaging on config.yml given that you can now install from rubygems
-Improved messaging about running as root (there's a warning now).

Oh, and added a built in DNS forwarder (based on rubydns).

This means that DNSMasq is no longer needed to use SiriProxy. You can now use the `-d` option and provide your SiriProxy server's address and it will set up a DNS forwarder for you. Just point your iPhone's DNS to your forwarder and you're good to go!