R1:e8e185ceb30e

Make Maniphest emails align title numbers better and fix a transaction
aggregation bug.

Summary:
Transactions always aggregated even when separated by large time
differences becuase of some clown typoing; fix that. Also make the subject
lines for tasks align better in the inbox.

Test Plan:
I'm feeling lucky.

Differential Revision: 29
Reviewed By: tomo
Reviewers: tomo