Integrate `user.getcurrentstatus` into `user.query`
Summary: D2492#6
Test Plan:
`user.query` of user which is away.
`user.query` of user which is not away.
`user.whoami` - no information there.
Reviewers: epriestley
Reviewed By: epriestley
CC: btrahan, aran, Koolvin
Differential Revision: https://secure.phabricator.com/D2502