Make stickler and pre-commit hook share flake8 config

.flake8

@@ -0,0 +1,3 @@
+[flake8]
+max-line-length = 115
+ignore = E128, E265, F403, W503, W1618  # http://pep8.readthedocs.org/en/latest/intro.html#error-codes

.stickler.yml

@@ -6,8 +6,7 @@ files:
 linters:
   flake8:
     python: 3
-    max-line-length: 115
-    ignore: E128,E265,F403,W503,W1618  # http://pep8.readthedocs.org/en/latest/intro.html#error-codes
+    config: .flake8
   eslint:
     config: ./.eslintrc.js
     install_plugins: true

git-hooks/pre-commit.sh

@@ -50,7 +50,7 @@ fi
 status=0
 git diff-index --check --cached $against --
 if [ $? != 0 ]; then status=1; fi
-git diff --cached | flake8 --diff --show-source --max-line-length=115
+git diff --cached | flake8 --diff --show-source --config=.flake8
 if [ $? != 0 ]; then status=1; fi
 
 # connect stdin to keyboard so user can interact