Add clover test coverage when testing

Author: RoccoHoward

phpunit.xml.dist

@@ -21,4 +21,7 @@
             <directory suffix=".php">./app</directory>
         </whitelist>
     </filter>
+    <logging>
+        <log type="coverage-clover" target="./build/logs/clover.xml"/>
+    </logging>
 </phpunit>