ENH: refs #0339. Add message about curl being required in statistics module

Author: zachmullen

modules/statistics/views/config/index.phtml

@@ -31,6 +31,7 @@ $this->headScript()->appendFile($this->moduleWebroot . '/public/js/config/config
     To install it: <a href="http://piwik.org/docs/installation/" target='_blank'>http://piwik.org/docs/installation/</a><br/><br/>
     This module requires an IPInfoDb API key.<br/>
     To get one, create an account at: <a href="http://www.ipinfodb.com/register.php" target='_blank'>http://www.ipinfodb.com/register.php</a><br/><br/>
+    This module requires PHP curl to be enabled on the server.<br/><br/>
      <?php
       echo "
       <form class='genericForm' id='configForm' method='{$this->configForm['method']}'  action='{$this->configForm['action']}'>