Move options handling out to a shared module.
Add irb rake task.
Initial stab at scheduling API.

To use the default scheduler, just do:

    TorqueBox::Scheduling.schedule(:foo, every: 1000) { puts "a second has passed" }
    TorqueBox::Scheduling.unschedule(:foo)

To create multiple schedulers:
    scheduler = TorqueBox::Scheduling.find_or_create("ham")
    scheduler.schedule(:foo, every: 1000) { puts "a second has passed" }

No tests yet.