Summary: If `jsxmin` is not available, use a pure PHP implementation instead (JsShrink).
Test Plan:
- Ran `arc lint --lintall` on all JS and fixed every relevant warning.
- Forced minification on and browsed around the site using JS behaviors. Didn't hit anything problematic.
Reviewers: vrana, btrahan
Reviewed By: vrana
CC: aran, Korvin
Differential Revision: https://secure.phabricator.com/D5670
Summary: Preview Phriction documents as they are edited, similar to how
Differential/Maniphest work.
Test Plan: Mashed my keyboard while editing a Phriction document.
Reviewed By: hsb
Reviewers: hsb, codeblock, jungejason, tuomaspelkonen, aran
CC: aran, hsb
Differential Revision: 684
