python-automat: new package

This is a new requirement for the Twisted package.

From the readme:

Automat is a library for concise, idiomatic Python expression of
finite-state automata (particularly deterministic finite-state
transducers).

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

lang/python/python-automat/patches/001-do-not-use-setuptools-scm-m2r.patch

@@ -0,0 +1,30 @@
+--- a/setup.py
++++ b/setup.py
+@@ -2,6 +2,7 @@
+ Setup file for automat
+ """
+ 
++import os
+ from setuptools import setup, find_packages
+ 
+ try:
+@@ -14,7 +15,7 @@ except(IOError, ImportError):
+ 
+ setup(
+     name='Automat',
+-    use_scm_version=True,
++    version=os.getenv('PKG_VERSION'),
+     url='https://github.com/glyph/Automat',
+     description="""
+     Self-service finite-state machines for the programmer on the go.
+@@ -22,10 +23,6 @@ setup(
+     long_description=long_description,
+     packages=find_packages(exclude=[]),
+     package_dir={'automat': 'automat'},
+-    setup_requires=[
+-        'setuptools-scm',
+-        'm2r',
+-    ],
+     install_requires=[
+         "attrs",
+         "six",