Buffered reader documentation for timeout 0

[pkess]

Some guys asked me what would happen if one is using the BufferedReader.get_message function with a timeout of 0. I checked the implementation and it looks like as this library relys on the Python SimpleQueue this is depending on the specific system. See here:
https://bugs.python.org/issue28982

I would like to suggest some changes at least to the documentation. I have the following proposals while not all of them might be done:

• Add information to the docstring that the timeout should always be a positive number (and maybe at least 10ms)
• Add a check for the timeout to be at least 10ms (or even 1ms)
• Add some information to the docstring that this relys on SimpleQueue and handling of a timeout of 0 or less is not specified

Please tell me your thoughts

[pkess]

Another point: maybe it might be useful if the user of the api had a function that is explicitly non blocking (either by an argument or by an explicit call.