waaay speed up Pet#translate_items

A few key changes:
  * Don't reload the whole pet 8 times!! Sooo many bad things
    happen, including redundant lookups of everything else and
    too many item saves and reindexes. Instead, fetch the item
    data, apply it to the items, and then save the items (once
    each!)
  * Updated my branch of globalize3 to be even better at avoiding
    redundant queries when saving. Woo.
  * Last realization: wrapping all the item saves in a single
    transaction works wonders. COMMIT seems to have high overhead,
    so doing only one took it from 50ms * 10 or whatever to 60ms.
    Good stuff.