Fix for #747 'git fetch' sporadically hangs, GitServiceExecutor now asynchronous.#840

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ijd02 wants to merge 2 commits intojakubgarfield:masterfrom

Commits on Jul 4, 2019

Fixed git deadlock bug in GitServiceExecutor. Fault due to stdIn and stdOut buffers filling, handling now asynchronous.
ian davis
committed
removed trailing white-space.
ian davis
committed