Grouparoo v0.3 introduces `syncModes`, which is our framework for bringing clarity to the myriad ways that folks' APIs handle updating data. Grouparoo now unifies this complexity into the following choices:

  * Sync: Add, update and remove profiles from the destination as needed.
  * Additive: Add new profiles and update those that already exist in the destination, but never remove anyone.
  * Enrich: Update profiles that already exist in the destination, enriching them with additional data and group membership information. No profiles are added or removed.