Use stickler for coding standards

Author: ocefpaf

.stickler.yml

@@ -1,5 +1,6 @@
 linters:
-    flake8:
-    pep8:
+  flake8:
+    max-line-length: 100
+    max-complexity: 10
 files:
-    ignore: ['*.ipynb']
+  ignore: ['*.ipynb', 'conf.py']

.travis.yml

@@ -17,8 +17,6 @@ matrix:
     env: TEST_TARGET=default
   - python: 3.6
     env: TEST_TARGET=default
-  - python: 3.6
-    env: TEST_TARGET=coding_standards
   - python: 3.6
     env: TEST_TARGET=notebooks
   - python: 2.7
@@ -61,12 +59,8 @@ script:
         python setup.py test ;
       fi
 
-    - if [[ $TEST_TARGET == 'coding_standards' ]]; then
-        find . -type f -name "*.py" ! -name 'conf.py' | xargs flake8 --max-line-length=100 ;
-        for file in $(find . -type f -name "*.ipynb"); do jupyter nbconvert --template=tests/strip_markdown.tpl --stdout --to python $file | grep -v '^get_ipython' | flake8 - --ignore=W391,E226,E402 --max-line-length=100 --show-source ; done ;
-      fi
-
     - if [[ $TEST_TARGET == 'notebooks' ]]; then
+        for file in $(find . -type f -name "*.ipynb"); do jupyter nbconvert --template=tests/strip_markdown.tpl --stdout --to python $file | grep -v '^get_ipython' | flake8 - --ignore=W391,E226,E402 --max-line-length=100 --show-source ; done ;
         py.test -vv tests/notebooks/test_notebooks.py ;
         doctr deploy --built-docs=examples/results --gh-pages-docs=gallery ;
       fi