Upgrade to dropwizard 0.7.
Updated iOS message delivery.

1) Use WebSockets for delivery if a client is connected.

2) If a client isn't connected, write to a redis queue and send
   an APN push.
Update sample config
Update websocket close codes to comply with RFC
Fix dependency conflicts.
Fix JSON reporter.
Support unrecognized properties.
By default, dont try to gunzip
Get JSON metrics response code.
Bump version to 0.16