Exclude Singly Development Sandboxes from the DDA.

We recently changed the name of the autogenerated app when new users
sign up and they're junking up the daily dev emails reports.
Remove sandbox from DDA NewApps report.

This makes the New Apps section of DDA more of a proxy for new users
with credit cards now that they are required to create a production app.
Merge pull request #837 from Singly/daily-dev-patches

Daily dev patches