Summary: This sets more reasonable values for the object handle fields imo. It's not like I ever want to find out what letter to use and then do `substr($handle->getType(), 0, 1).$handle->getID()` to get `D1` each time I use handles. Name: - D1 - T1 - M1 - P1 - etc. Fullname: - D1: Something - T1: Something - etc. In addition, this helps me to reasonable prefill Hovercards in case there is no application-specific event listener. Also deletes `title` and `alternateID` completely. They deserved that. Test Plan: Visited places, nothing broke (We only ever used `$handle->getName()` for users and commits). Tested mail reply handler. Did not test the other way around, but should be fine. Hovercards broken until D5572 (would love to induce a cyclic dependency) Reviewers: epriestley, chad, btrahan Reviewed By: epriestley CC: aran, Korvin Differential Revision: https://secure.phabricator.com/D5571