[python] add pipeline.start(cfg, cb), handle gil properly everywhere - #3739
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…/close/wait_for_frames functions
ev-mp
approved these changes
Apr 21, 2019
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Releasing the GIL on stop/close will help prevent deadlocks with callbacks written in python.
Releasing it on wait_for_frames/try_wait_for_frames will help responsiveness in multithreaded situations
Tracked on: DSO-12493