Add flake8 file

Author: bobleesj

.flake8

@@ -0,0 +1,16 @@
+[flake8]
+exclude =
+    .git,
+    __pycache__,
+    build,
+    dist,
+    doc/source/conf.py,
+    */doc/source/conf.py,
+    hooks/post_gen_project.py,
+    */__init__.py,
+    */debug.py
+builtins = cookiecutter
+max-line-length = 115
+# Ignore some style 'errors' produced while formatting by 'black' (see link below)
+# https://black.readthedocs.io/en/stable/guides/using_black_with_other_tools.html#labels-why-pycodestyle-warnings
+extend-ignore = E203