Add item aliases to runescape utils.

[TimHillier]

I want to be able to use shorter alieses for items with long names.

• Add new command "!ge-alias" that adds shorthand for items into a db
• query that db if the api call doesn't respond with anything
• Add new table for ge aliases.
  Example:
  -> !ge-alias sardomin godsword sgs
  -> !ge sgs
  -> Returns data for the sardomin godsword

[TimHillier]

The issue here is how do we tell what's a name of an item and the alias?