add favicon

fixes #471

Author: gemal

src/Hal/Report/Html/Reporter.php

@@ -109,6 +109,8 @@ public function generate(Metrics $metrics)
  throw new RuntimeExceptionAlias(sprintf('Unable to write in the directory "%s"', $logDir));
  }
 
+ copy($this->templateDir . '/html_report/favicon.ico', $logDir . '/favicon.ico');
+
  recurse_copy($this->templateDir . '/html_report/js', $logDir . '/js');
  recurse_copy($this->templateDir . '/html_report/css', $logDir . '/css');
  recurse_copy($this->templateDir . '/html_report/images', $logDir . '/images');