New features

This release adds support for configuring what to do when a worker callback throws an unhandled exception.

#1023846: Add APC password setting to prod_check settings page
#1023834: Add email setting to prod_check settings page

Switched from three column to two column theme.
Made other changes to give consistency to the theme.

- Add index for looking up by entity_type + url/ guid to feeds_item table.
- #994026 tristanoneil: Optionally defuse email addresses.

First D7 release.

Lots of style changes to give the theme more consistency.