SQLs: Move world_database.sql to dev folder

Simply because people can't read instruction guides...

.travis.yml

@@ -25,7 +25,7 @@ script:
   - mysql -uroot < sql/create/create_mysql.sql
   - mysql -uroot auth < sql/base/auth_database.sql
   - mysql -uroot characters < sql/base/characters_database.sql
-  - mysql -uroot world < sql/base/world_database.sql
+  - mysql -uroot world < sql/base/dev/world_database.sql
   - for file in sql/updates/world/*.sql; do mysql -uroot world < $file; done
   - mysql -uroot < sql/create/drop_mysql.sql
   - cd bin