Allow queues to be used as tasks.
Cleaner fix for JSON-like Gearfiles

This removes the need to wrap some Gearfiles in IIFEs, while keeping
backwards compatibility.
Merge pull request #18 from fpirsch/fix-gearfile

Remove need for IIFEs in some Gearfiles
Merge pull request #17 from fpirsch/Feature-nested-queues

Allow queues to be used as tasks.