Globally renamed "sponsor" to "organization"

Some browser ad blockers will block pages that have "sponsor" in
their URLs.  Renamed everywhere for consistency.
module EventSeed

Moved seed function for events into its own module.
Want better separation so this doesn't get into production.
/admin/events - select organization from a dropdown
.gitignore - .tags
/organizations - disabled table row and cell selections
/admin/events - removed dead code
/ Repaired calendar

Repaired calendar
/register - Added contact info
/ - Added 'Month' and 'Week' buttons to calendar.