added linting pipeline

.gitignore

 # Ignore plots
 *.png
+
+# Ignore IDE files
+.idea

.gitlab-ci.yml

+stages:
+  - test
+
+test:pylint:
+  stage: test
+  allow_failure: true
+  image: python:3
+  before_script:
+    - pip install pylint
+  script:
+    - SCORE=$(find . -iname '*.py' -not -path '**/venv/*' -exec pylint {} +)
+    - echo $SCORE > pylintscore
+    - SCORE=$(tail -1 pylintscore | head -1)
+    - SCORE=${SCORE%/*/*}
+    - SCORE=${SCORE##* }
+    - echo $SCORE
+  only:
+    changes:
+      - "**/*.py"