R1:fa36dd513c93

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