* Master workers no longer launch Slave workers, that is done on the Root
worker (for monitoring purposes).
* Configs and defaults are now accessed via Minions#[]
* Added a "railtie" which is only loaded on a rails environment. This
  enables a rails process to enqueue jobs on minions
When a minion as no task_schedules, MinionConfig#task_schedules should
return []
Added missing 'rails env loader'....
* Renamed Minions::Minion class methods "initialize" and "finalize" to
"initializer" and "finalizer" (to avoid confusion...)
* WorkerLogger now has a method to log exceptions in a "pretty way"
Args passed to the master/slave task handlers are to be splatted
Also, minor change on the log output of the Root worker
bumped up a version