R1:ef1bedef028f

Add ApplicaionTransactions and a mutable view policy to Slowvote

Summary: Schema changes to modernize this app.

Test Plan: Ran schema changes, created a new slowvote. No real effects yet.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D6453