0.8.0

• Service resolvers now resolve to a callable. This allows for closures to do work.
• Consumer is now responsible for creating Invoker object.
• Spork return a Proxy object that allows calling the right method on service object.
• New schema for DoctrineDriver. Queues are now kept in a seperate table.
• ObjectResolver now supports object instances and class names. Laravel can then register
  facades.
• ServiceResolvers now takes an optional array of array('MessageName' => $service).