Makes pika queue async now.
Merge pull request #1 from ifit/makeItAsync

Makes pika queue async now.
Version bump
pika-queue should give callbacks an actual error
version bump
Merge pull request #2 from ifit/errorz

Errorz
Adds in method to stop monitoring a queue.
Merge pull request #3 from ifit/stopMonitoring

Adds in method to stop monitoring a queue.
Bumped version number
We can now know when that last job finishes
Merge pull request #4 from ifit/stopMonitoring

We can now know when that last job finishes
Wrapped recursive call in process.nextTick so we don't kill the stack.
Fixed some formatting
Merge pull request #5 from ifit/next-tick

Wrapped recursive call in process.nextTick so we don't kill the stack.
Version number bump
If the queue is empty then the cb will be fired no matter what
Merge pull request #6 from ifit/stopMonitoring

If the queue is empty then the cb will be fired no matter what
Version bump