Updated to return false instead of "Invalid Response"

Invalid responses and "non-threatening" IP address results come back as the same thing. I couldn't find a way to get it to return something more alerting when the DNS lookup failed, so this will have to do. If you're caching your results for a short period of time, then any issues with the API should correct themselves within the TTL of your data

ProjectHoneyPot.php

@@ -85,7 +85,7 @@ class ProjectHoneyPot
 			}
 			else
 			{
-				return array('error' => 'Invalid Response');
+				return false;
 			}
 		}