flake8 gitlab ajustments

* ajust ci config for gitlabs ci
* reduced max line length to 120

It seems gitlab prefers it that way

+ add some comments

.gitlab-ci.yml

@@ -7,10 +7,12 @@ before_script:
   - pip install flake8
 
 stages:
-  - Static Analysis
+  - check
 
 flake8:
-  stage: Static Analysis
+  stage: check
   script:
-  - flake8 --count --select=E9,F63,F7,F82 --show-source --statistics
-  - flake8 --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    # breaking errors and syntax errors
+    - flake8 --select=E9,F63,F7,F82 --show-source
+    # pep8 warnings
+    - flake8 --max-complexity=10 --max-line-length=120 --show-source