Bug

- Disallowed @ and / from an attribute name or modifier.  This causes
  input like 'user@host:path' to now be parsed as description, and not
  as an unrecognized attribute.

src/Nibbler.h

@@ -69,6 +69,8 @@ public:
   char next ();
   std::string next (const int quantity);
 
+  std::string::size_type cursor ();
+
   void save ();
   void restore ();