Add a unit test for MemoryQueue + fix totalTasks stat
Use self instead of MemoryQueue.this
Fix totalTasks + add more tests for MemoryQueue
Change priority test for MemoryQueue
Merge pull request #25 from wajam/clement-delayed-tasks

Add a unit test for MemoryQueue + fix totalTasks stat
Merge branch 'master' into manu-demo2
Scalariform reformating