1. Implement all read() primitives using readLoop() like it was done in streams.
2. Fix readLine() bug.
3. Add readMessage() primitive.
4. Fixing exception hierarchy, handling code and simplification of (break/continue + exception).
5. Fix TLSStream closure procedure.
6. Add BoundedStream stream and tests.
7. Remove `result` usage from the code.
* Fix cancellation behavior.
Fix some compilation warnings.
* Fix cancelAndWait() and add proper documentation.
* Add completed(Future) and done(Future) calls to check if Future[T] completed without an error.
* Add stepsAsync() and tests.
* Fix comments.
* Fix new primitive comment, to avoid usage for task switches.
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