Start a hot tips for devs doc

docs/dev_tips.rst

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+Hot tips for ``tractor`` hackers
+================================
+
+This is a WIP guide for newcomers to the project mostly to do with
+dev, testing, CI and release gotchas, reminders and best practises.
+
+``tractor`` is a fairly novel project compared to most since it is
+effectively a new way of doing distributed computing in Python and is
+much closer to working with an "application level runtime" (like erlang
+OTP or scala's akka project) then it is a traditional Python library.
+As such, having an arsenal of tools and recipes for figuring out the
+right way to debug problems when they do arise is somewhat of
+a necessity.
+
+
+Making a Release
+----------------
+We currently do nothing special here except the traditional
+PyPa release recipe as in `documented by twine`_. I personally
+create sub-dirs within the generated `dist/` with an explicit
+release name such as `alpha3/` when there's been a sequence of
+releases I've made, but it really is up to you how you like to
+organize generated sdists locally.
+
+
+.. _documented by twine: https://twine.readthedocs.io/en/latest/#using-twine
+
+
+Debugging and monitoring actor trees
+------------------------------------
+TODO: but there are tips in the readme for some terminal commands
+which can be used to see the process trees easily on Linux.
+
+
+Using the log system to trace `trio` task flow
+----------------------------------------------
+TODO: the logging system is meant to be oriented around
+stack "layers" of the runtime such that you can track
+"logical abstraction layers" in the code such as errors, cancellation,
+IPC and streaming, and the low level transport and wire protocols.