Multiple Bug Fixes

[laduchesneau]

This PR includes multiple bug fixes and a minor change to make code more readable.

• Changed the receiver names for Receivable, Transmittable and Transceivable. They were all using t, i change it to tr,tx, and trx, so it more easy to understand what the function receiver is.
• The closing function from transmittable and receivable, no longer calls the OnClosed handler, they will now call the transceivable closing function that will now handle closing process and call the OnClosed handle.
• The only closing state that will not trigger OnClosed call is ExplicitClosing. This is the current behavior, only the comment has been change to indicate this behavior.
• Removed useless call to close() in the rebind() function. rebind() is only called when closing() fucntion has been called anyway.
• Added new closing state to help indicate when a bind has been closed because the user request it after handling a expired request.
• Fixed a bug in the windowCleanup function that would wait indefinitely on wg.wait function.
• Removed erroneous multiplication of milliseconds for some timers

Will resolve #170