Initial code-climate config (#491)

* Initial code-climate config

* Try 2

* addressed kseever's comments

* Updated exclude_patterns for bandit

* Update filepaths

* Updated defaults

* Kyle's comments

Author: Ross Mechanic

.codeclimate.yml

@@ -0,0 +1,52 @@
+version: "2"         # required to adjust maintainability checks
+checks:
+  argument-count:
+    config:
+      threshold: 7
+  complex-logic:
+    config:
+      threshold: 7
+  file-lines:
+    config:
+      threshold: 500
+  method-complexity:
+    config:
+      threshold: 7
+  method-count:
+    config:
+      threshold: 20
+  method-lines:
+    config:
+      threshold: 25
+  nested-control-flow:
+    config:
+      threshold: 4
+  return-statements:
+    config:
+      threshold: 4
+  similar-code:
+    config:
+      threshold: # language-specific defaults. an override will affect all languages.
+    exclude_patterns:
+      - "simple_history/tests/"
+      - "simple_history/registry_tests/"
+  identical-code:
+    config:
+      threshold: # language-specific defaults. an override will affect all languages.
+    exclude_patterns:
+      - "simple_history/tests/"
+      - "simple_history/registry_tests/"
+plugins:
+  bandit:
+    enabled: true
+    exclude_patterns:
+      - "simple_history/tests/"
+      - "simple_history/registry_tests/"
+  pep8:
+    enabled: false
+  radon:
+    enabled: true
+    threshold: "C"
+  sonar-python:
+    enabled: true
+