0.16

• Coroutines that are scheduled for execution are cancellable by default now
  • suspendAtomicCancellableCoroutine function is introduced for funs like
      send/receive/receiveOrNull that require atomic cancellation
      (they cannot be cancelled after decision was made)
  • Coroutines started with default mode using
      async/launch/actor builders can be cancelled before their execution starts
  • CoroutineStart.ATOMIC is introduced as a start mode to specify that
      coroutine cannot be cancelled before its execution starts
  • run function is also cancellable in the same way and accepts an optional
    CoroutineStart parameter to change this default.
• BroadcastChannel factory function is introduced
• CorouiteExceptionHandler factory function is introduced by @konrad-kaminski
• integration directory is introduced for all 3rd party integration projects
  • It has contribution guidelines and contributions from community are welcome
  • Support for Guava ListenableFuture in the new kotlinx-coroutines-guava module
  • Rx1 Scheduler support by @konrad-kaminski
• #66 Fixed a number of Channel and BroadcastChannel implementation bugs related to concurrent send/close/close of channels that lead to hanging send, offer or close operations.
  Thanks to @chrisly42 and @cy6erGn0m for finding them.
• #67 Fixed withTimeoutOrNull which was returning null on timeout of inner or outer withTimeout blocks.
  Thanks to @gregschlom for finding the problem.
• Fixed a bug where Job fails to dispose a handler when it is the only handler by @uchuhimo