Overhaul docs for Windows filemon install

sheesh, hopefully this is "most" of it..although definitely still not
all we need yet..

docs/base/install/windows/python.rst

@@ -0,0 +1,117 @@
+
+========
+ Python
+========
+
+You will need Python in order to use any Rattail software on Windows.
+
+You can get it from: `<https://www.python.org/downloads/windows/>`_
+
+The notes below should help you decide which version to install etc.
+
+
+Which Version?
+--------------
+
+In general you are encouraged to use the "latest stable" version of
+Python unless you have a reason to be more conservative.
+
+As of this writing Python 3.10 is the "latest" but has not yet been
+tested in production, so it is suggested to use 3.9 instead, since
+that has been tested.  That is the situation "today" (Oct 2021) and
+eventually should change.
+
+Any other Python-based packages you may need to install, must of
+course be compatible with the version of Python you have.  This
+includes Rattail itself (see :doc:`rattail`) but also e.g. the pywin32
+library (see :doc:`pywin32`) and perhaps wxPython.  You may want to
+gather your download links ahead of time to be sure they all are for
+the same Python version.
+
+Note that in general, e.g. if you only need the Rattail File Monitor,
+then you will not likely need to "upgrade" Python anytime soon.  If
+you install 3.9 for instance then it should continue to work fine for
+the forseeable future.
+
+
+32 bit vs. 64 bit
+-----------------
+
+In some cases, your Rattail app(s) may need to load and invoke code
+from various compiled libraries.  The most common scenario is that the
+app needs to read data from an ODBC connection which uses a binary
+driver.
+
+Sometimes these libraries are only available in a 32 bit version.  If
+this is the case for you then you must install 32 bit Python, even on
+a 64 bit machine.
+
+Again you may want to gather all download links ahead of time to be
+sure everything matches, for both Python version and "bitness".
+
+.. note::
+   The above statements "used to be true" but it's been a while since
+   I had my head in that game, and much may have changed.
+
+   In particular if you only need the Rattail File Monitor, and only
+   need it to do standard tasks like moving files to a Linux server,
+   then there should be no binary libraries involved and you will be
+   fine to use 64bit Python.
+
+
+Installation
+------------
+
+Download the appropriate installer from
+`<https://www.python.org/downloads/windows/>`_
+
+Right-click the installer file and choose "Run as administrator" to
+launch it.
+
+If you are wanting to use the Rattail File Monitor then you should
+install Python "for all users" - this requires that you "customize"
+the installation.  In other words don't just click "Install Now" but
+instead click "Customize" and then select the option to install for
+all users.
+
+You should also see an option to "Add Python to your PATH variable" -
+it is recommended that you choose this unless you have a reason not
+to.
+
+
+.. _python-sanity-check:
+
+Sanity Check
+------------
+
+Once the installation completes, you should open a *new* console
+(``cmd.exe``) and confirm that ``python.exe`` is usable:
+
+.. code-block:: none
+
+   C:\>python --version
+   Python 3.9.7
+
+If that doesn't work then it is probably due to one of 2 things:
+
+If your console window was already open during the install, please close
+it and re-open, then it should work.
+
+Or, if still no good, then you probably did not add Python to your
+PATH variable during the install.  You can of course re-install, but
+you can also manually add it to PATH if you prefer.  
+
+If you want to manually add Python to PATH then see e.g. `this
+article`_ for instructions.  You will need to add 2 folders to the
+variable, paths of which may vary per your install.  If you installed
+"for all users" as described above then the folders are probably
+something like:
+
+* ``C:\Program Files\Python39``
+* ``C:\Program Files\Python39\Scripts``
+
+.. _this article: http://www.computerhope.com/issues/ch000549.htm
+
+If PATH looks good and you re-opened your console, and things still do
+not work, then please file a bug report at
+https://redmine.rattailproject.org/