shell of disk QueueStorage class
possibly working disk storage, needs tests
closer to functioning with tests
re-implemented pyaio gevent interaction
removed unused import
Merge branch 'master' into diskstorage
slightly improved queue.disk code coverage
Merge branch 'master' into diskstorage
added doc links for disk queue storage
fixed bug when using pyaio 0.3
pyaio 0.4 is now available