Polling and queueing into processor improved.
queueing specification change.
Fix bug.
Fix spec.
Location moved.
configuration file relocation.
Polling mechanism refined.
Add config.rb in spec/config.
Prefixed queue is also available.
Prefixed que naming.
Arsenicum::#{Engine}::Configuration should not be a subclass of QueueConfig.
Refactor to instantiate logger.
Arguments should be optional.
Engine configuration is now held in the queue.
shorthand accessor to Arsenicum::Configuration.instance and its alias.
Update queue impl spec. Message retrieval method is now :receive.
1. Message receiving method is now :receive.
2. The name of the variable standing for the identifier of the message is now :id.