Implement remarkup custom control

Summary: Ref T2575. Adds "remarkup" control, which displays a remarkup control and uses the remarkup cache. Grants fields access to remarkup pipeline.

Test Plan:
{F35067}
{F35068}

Used DarkConsole to verify cache interaction with services.

Reviewers: hach-que, btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2575

Differential Revision: https://secure.phabricator.com/D5286