Add raw_bytes option#126

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Preston-Landers wants to merge 8 commits intolinsomniac:masterfrom

Preston-Landers:master

Commits on Dec 4, 2016

Temporarily avoid the use of `get_module_constant` which appears to be broken in Python 3.6
Preston-Landers
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Commits on Dec 5, 2016

Add `raw_bytes` client option to return the bytes instead of trying to decode to Unicode string.
Preston-Landers
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Commits on Dec 7, 2016

Fix the following resource warning for unclosed sockets on connections errors:
Preston-Landers
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