* rewrite Stream{} to use much less mutex locking, update related code
* use new context for the stream context
* ensure stream gets closed on return of writeTo / readFrom WSConn()
* ensure stream write timeout gets cancelled
* remove embedded context type from Stream{}, reformat log messages for consistency
* use c.Request.Context() for context passed into Stream().Open()
* only return 1 boolean, fix tests to expect multiple stream types in messages
* changes to ping logic
* further improved ping logic
* don't export unused function types, update message sending to only include relevant stream type
* ensure stream gets closed 🤦
* update to error log on failed json marshal (instead of panic)
* inverse websocket read error checking to _ignore_ expected close errors
kim