P4P release 3.0.0

[Michael Davidsaver <mdavidsaver@gmail.com>]

I'd like to announce the availability of P4P (PVAccess for Python)
library version 3.0.0.  Quite a bit of work has been done since the
previous 1.0 release.  Thanks to DLS for supporting this work.

https://mdavidsaver.github.io/p4p/

The headline features are support for running PVA servers, interop
with the asyncio and cothread concurrency libraries, support for
Windows and OSX* as well as Linux, and packaging via pypi.org.

The last point means that investigating P4P starts with a simple:

> pip install p4p

No other setup is required.

See the quickstart section for where to go from there.

https://mdavidsaver.github.io/p4p-dev/starting.html


Alternately, P4P can be built as an EPICS module in the usual way.

https://github.com/mdavidsaver/p4p/releases/tag/3.0.0




* I'm interested in OSX test results as I have a report
  of a strange failure from one user.