arc linters: Filter by name, make display one-line

Summary: allow searching/filtering linters displayed by name.

Test Plan:
$ arc linters --verbose --search JSon --search ruby (Lots of text about many linters)
$ arc linters --search JSon ruby (error message)
$ arc linters python (no results, "try --search").
$ arc linters ruby (Verbose text about the "ruby" linter).

Reviewers: joshuaspence, #blessed_reviewers, epriestley

Reviewed By: joshuaspence, #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D10706