added YARD to ring buffer and blocking ring buffer
moved ring buffer and blocking ring buffer from channel to collections folder
Refactored AtomicFixnum as subclass/superclass rather than module include.
Refactored specs for CountDownLatch into behaves_as
Implemented JavaCountDownLatch
CountDownLatch now inherits from MutexCountDownLatch or JavaCountDownLatch.
Fixed documentation for PriorityQueue.
Updated docs for AtomicFixnum.
Fixed bug when passing subsecond times to Java classes.
Merge branch 'master' into refactor/tasks
Added AtomicBoolean class