v0.1.2

Added

• Item.isNull to check if an item has a null schema
• It's now possible to override the authorization rules for /sys/users and
  /sys/*
• Query.sortDescending to sort results in descending order

Changed

• Item.get now returns undefined for null items

Fixed

• Init script calling manager.register() instead of manager.registerSchema()
• Item.isNull now works as expected