Cleaning up the merchantlist table

[cavedude]

I know I couldn't do this, and that it can be done as that's how we get faction, loot, etc but I think the ultimate solution would be to create a script that compares our merchantlist to the information found on Allakhazam. This would not be exact as Ally may be missing or have wrong/outdated info but I certainly think it would give us a great idea of items that do not belong on vendors.