added code climate to project

Author: LatvianPython

.codeclimate.yml

@@ -0,0 +1,8 @@
+version: "2"
+plugins:
+  duplication:
+    enabled: true
+    config:
+      languages:
+        python:
+          python_version: 3

README.rst

@@ -14,6 +14,11 @@ jira-dumper
     :target: http://mypy-lang.org/
     :alt: Checked with mypy
 
+
+.. image:: https://img.shields.io/codeclimate/maintainability/LatvianPython/jira-dumper
+    :target: https://codeclimate.com/github/LatvianPython/jira-dumper
+    :alt: Code Climate maintainability
+
 Allows for hopefully easy and simple data dumps from Jira servers
 
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