Move docs, provide link in README.

modules/doc/prelude-python.md

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+# Prelude Python Quickstart
+
+## Python Mode
+
+Emacs comes with Python programming support through the built-in
+Python-mode. Whenever you are editing Python code run `C-h m` to
+look at the Python mode key bindings. Alternatively look at the
+menu bar entries under Python. To toggle the menu bar press `F12`.
+
+## Syntax checking
+
+Prelude ships with [Flycheck](https://github.com/flycheck/flycheck),
+an on the fly syntax checker. Flycheck has support for Python two
+syntax checkers, [Pylint](http://www.pylint.org/) and
+[Flake8](http://flake8.readthedocs.org/en/latest/). In
+order to have Flycheck support on the fly syntax checking for
+Python you need to have either of these installed and accessible to
+Emacs. In order to manually choose a checker run `C-c ! s`.