Update ampersand-sync-localforage.js
Update ampersand-sync-localforage.js

The previous behaviour was causing the first model in a collection to be overwritten every time the create method was called because it was using the previous model's localforageKey.
Neofonie/ampersand-sync-localforage,rejas/ampersand-sync-localforage,garrettn/ampersand-sync-localforage