Update copyright text to match TNT's suggestion

I'm doing some back-and-forth on the contract between me and TNT, and
they proposed this amendment to the copyright text in the Fan Site
Agreement. Implemented now!

config/locales/en-MEEP.yml

@@ -37,7 +37,7 @@ en-MEEP:
         contact: Meeptact
         suggestions: Suggesteeps
         email: Questions, comments, meepits
-        copyright: Images © 2000–%{year} Neopets, Inc. All Rights Reserved.
+        copyright: Images © 1999–%{year} World of Neopets, Inc. All Rights Reserved.
           Used With Permission. Meep.
 
     items:

config/locales/en.yml

@@ -37,7 +37,7 @@ en:
         contact: Contact
         suggestions: Suggestions
         email: Questions, comments, bugs
-        copyright: Images © 2000–%{year} Neopets, Inc. All Rights Reserved.
+        copyright: Images © 1999–%{year} World of Neopets, Inc. All Rights Reserved.
           Used With Permission
 
     items:

config/locales/pt.yml

@@ -29,7 +29,7 @@ pt:
         contact: Contato
         suggestions: Sugestões
         email: Perguntas, comentários, erros
-        copyright: Images © 2000–%{year} Neopets, Inc. All Rights Reserved. Used With Permission
+        copyright: Images © 1999–%{year} World of Neopets, Inc. All Rights Reserved. Used With Permission
     items:
       title_tagline: Banco de dados de roupas e artigos aplicáveis de Neopets
       search: Pesquisa