Check if a stream is closed just before writing to the stream channels#33

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aphistic wants to merge 2 commits intodonovanhide:masterfrom aphistic:master

+183-105

Commits on Oct 30, 2017

Add locks around stream channel writes so they can't be closed while being written to
aphistic
committed

Commits on Nov 8, 2017

Change stream internals so it uses a goroutine and channels to handle state.
aphistic
committed