Allow single attribute updates/overwrites via API

Currently if you need to update a piece of member information (for example location or status) via the API, you must provide all the user data with existing data with the new data (for example you want to update locations, you must provide the members home address as part of the process, or it will be deleted. It would be beneficial to be able to just submit the piece of data that needs to be changed or updated without having to provide all the data over again.