Changes to drop_item.

Created by: ComicIronic

The drop_item arg is now the loc placed, not the child of the loc or whatever. drop_item(X) now places the item dropped IN X, not in X's loc. Current code has been changed to match. Removed a few lines of items being placed into themselves, on themselves, into other things manually, into their users, etc. Cleans up the fix for MoMMI recharger silliness.

This took about 2 hours of non-stop manual searches.