Make it possible to disable the autorun class.

I want to write unit tests for my handlers, and so the autorun kicking off is highly
inconvienient. Make it so that this can be optionally disabled by requiring a handler
and then calling HandlerClass.disable_autorun
Change to false
Merge pull request #61 from bobtfish/be_able_to_remove_autorun

Make it possible to disable the autorun class.