[WIP] add ping method and auto-ping-pong - #445

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atomic-coders:added-ping-method

Commits on Dec 13, 2018

added ping method (to receive a pong, and don't trigger re-connect if nothing happens)
cwolters
committed
ea9904b
fixed "
cwolters
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9acbf6e
fixed "
cwolters
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2922609

Commits on Dec 14, 2018

use send() in first place instead of ws._send() to get an additional check if the ws is still connected
cwolters
committed
4152a6f
fixed unit tests - _sendCalc is now using sendMessage - and this needs an open connection
cwolters
committed
18fabeb