add scrutinizer

Author: Paul M. Jones

.scrutinizer.yml

@@ -0,0 +1,10 @@
+filter:
+    paths: ["src/*"]
+tools:
+    external_code_coverage: true
+    php_code_coverage: true
+    php_sim: true
+    php_mess_detector: true
+    php_pdepend: true
+    php_analyzer: true
+    php_cpd: true