* This commit adds handlers for the asyncio/uvloop protocol callbacks for pause_writing and resume_writing.
These are needed for the correct functioning of built-in tcp flow-control provided by uvloop and asyncio.
This is somewhat of a breaking change, because the `write` function in user streaming callbacks now must be `await`ed.
This is necessary because it is possible now that the http protocol may be paused, and any calls to write may need to wait on an async event to be called to become unpaused.
Updated examples and tests to reflect this change.
This change does not apply to websocket connections. A change to websocket connections may be required to match this change.
* Fix a couple of PEP8 errors caused by previous rebase.
* update docs
add await syntax to response.write in response-streaming docs.
* remove commented out code from a test file
* add unit tests, which should fail
* fix CIDict
* moving CIDict to avoid circular imports
* fix unit tests
* use multidict for headers
* fix cookie
* add version constraint for multidict
* omit test coverage for __main__.py
* make flake8 happy
* consolidate check in for loop
* travisci retry build
Before: Even after raising ResponseTimeout, server still processes
remaining tasks until it is done
After: Before raising ResponseTimeout, server stops working task.
Fixed error where KeepAliveTimeout wasn't being triggered in the test suite, when using uvloop
Fixed test cases when using other asyncio loops such as uvloop
Fixed Flake8 linting errors
* add recycling feature to gunicorn worker
* add unit tests
* add more unit tests, and remove redundant trigger_events call
* fixed up unit tests
* make flake8 happy
* address feedbacks
* make flake8 happy
* add doc
