Socket in blocking mode - requires program restart after unexpected server shutdown

[steveroch-rs]

Due to the socket being implemented as a blocking socket other software using mcrcon module is incapable of continuing execution when the connection to the server socket is closed unexpectedly (broken pipe).

Implementing the socket in non-blocking mode would resolve this issue.
Great module nonetheless :)

[unexceptable]

Sorry, haven't played with anything Minecraft related in ages, and likely won't have a chance to fix this myself any time soon. But if you feel like opening a pull request which changes how the socket is setup/used I will happily review/test it, then release a new version to pypi. :)