Moved the cron expression to a new UI.

Ready to merge changes and continue finishing up configuration tools.
Made a directive out of the cron UI.
Merge branch 'master' of https://github.com/di2e/openstorefront
Got the custom component refresh rate taken care of.

Still need to add a global deactivate button, wiring for the refresh all, start/stop times for jobs, a table refresh button (for status), and the popover message for errors.
Merge pull request #430 from Jedwondle/master

Changes in the cron ui.