0.2.2

• Reject connections if RSV is not equals to 0.
• Validate close reasons to be valid UTF-8 if UTF-8 validation has been requested.
• Accept zero-length frames starting a message.
• Deliver stored messages correctly if they're immediately followed by a close.
• Reject continuations if there's no started message.
• Disable streaming for frames. A single frame is now always buffered. A message can still be streamed via multiple frames.