initializing dynamic receptacles

freeing random-order stackframes

Python 3.7 compatibilty (jquast#33)

* Fix syntax errors in python 3.7 due to async being a reserved word
* Update tests to use await/async syntax
* drop python3.4 and custom coverage combining
* document 1.0.1 release, project status: seeking new owner :-)

Release of large refactor and 1.0 API

Though not yet very well documented other than the README.rst
file, we release a new 1.0 API with a ``shell(reader, writer))``
pattern.  This is not very compatible with the previous 0.1 API, but is
much easier to work with. The client and server have both improved
dramatically during this process, and we're somewhere north of 78% code
coverage.

Merge pull request jquast#17 from jquast/0.4.0

Prepare 0.4.0 release

Release 0.3.0

* bugfix: cannot bind to IPv6 address, closes issue jquast#5
* enhancement: Futures waiter_connected, and waiter_closed added to
* server.
* change: TelSh.feed_slc merged into TelSh.feed_byte as slc_function
* keyword.
* change: TelnetServer.CONNECT_DEFERED class attribute renamed DEFERRED.
* Default value changed to 50ms from 100ms.
* enhancement: Default TelnetServer.PROMPT_IMMEDIATELY = False ensures
* prompt is not displayed until negotiation is considered final.  It is
* no longer "aggressive".
* enhancement: TelnetServer.pause_writing and resume_writing callback
* wired.
* enhancement: TelSh.pause_writing and resume_writing methods added.

Merge pull request jquast#7 from sethb0/master

added PipSession to make it work on recent pip

initial release