add scrutinizer config for coverage

.scrutinizer.yml

@@ -0,0 +1,8 @@
+filter:
+    excluded_paths:
+        - 'tests/*'
+        - 'vcr/*'
+tools:
+    external_code_coverage:
+        timeout: 300
+        runs: 3

.travis.yml

@@ -6,7 +6,9 @@ python:
 install:
     - make init
     - pip install coveralls
+    - pip install scrutinizer-ocular
 script:
     - make test
 after_success:
     - coveralls
+    - ocular