R1:5943ae467079

v0 embedding slowvotes

Summary: Slowvotes can now be embed using {V*} syntax. Nothing fancy there yet.

Test Plan: {F40842}

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin, chad

Maniphest Tasks: T2883

Differential Revision: https://secure.phabricator.com/D5713