Add pytest/flake8/isort rules

setup.cfg

@@ -0,0 +1,25 @@
+[tool:pytest]
+python_files = test_*.py
+testpaths =
+    tests
+
+[flake8]
+show-source = True
+max-line-length = 80
+ignore =
+    # E123: closing bracket does not match indentation of opening bracket's line
+    E123
+
+[isort]
+line_length = 80
+multi_line_output=3
+include_trailing_comma=1
+use_parentheses=1
+known_crunch=cr
+sections=FUTURE,STDLIB,THIRDPARTY,FIRSTPARTY,CRUNCH,LOCALFOLDER
+default_section=THIRDPARTY
+not_skip = __init__.py
+skip =
+    # We use tox for this project, so make sure to skip this directory
+    .tox
+