Merge pull request #547 from python-rope/lieryan-add-flake8-config

Add config file for linters

setup.cfg

@@ -0,0 +1,15 @@
+[flake8]
+extend-ignore =
+    # F841: local variable `name` is assigned to but never used
+    # while useful as a warning while writing code, the workarounds to avoid
+    # getting this error is often worst than the original problem
+    F841
+
+    # E203: whitespace before ':'
+    # this rule contradicts black codestyle
+    E203
+
+max-line-length = 110
+
+[pycodestyle]
+max-line-length = 110