Give a hint when someone mistakenly calls a wildcard module wrong (refs #12)

git-svn-id: https://labs.omniti.com/resmon/branches/resmon2@411 8c0face9-b7db-6ec6-c4b3-d5f7145c7d55

lib/Resmon/Module.pm

@@ -12,11 +12,11 @@ sub new {
 }
 
 sub handler {
-    die "Monitor not implemented.\n";
+    die "Monitor not implemented. Perhaps this is a wilcard only module?\n";
 }
 
 sub wildcard_handler {
-    die "Monitor not implemented.\n";
+    die "Monitor not implemented. Perhaps this is a non-wildcard module?\n";
 }
 
 sub cache_metrics {