Derby Pie ( 4.0.0 )

• Changes behavior in full_hydrate for patch requests allowing for partial updates
• Fixes an async bug in field dehydration where if called from a subclass, function calls may not finish before a second iteration begins causing parent chain problems
• Http helpers allow for an empty body by sending data as null
• Adds support for OPTIONS requests for List / Detail actions
• Better help text for the auto id & uri fields
• bugfix when using a serializer on an API instance crashes on node v6
• Better handling of partial updates for PATCH requests
• cache option on resource is no a config object instead of a cache instance