Removed Seats

The seat model is unnecessary. The table already has
a variable for max number of seats. This can be used
along with a assigned seats variable in Guest to keep
track of occupied/unoccupied seats.

Signed-off-by: Joan Tiffany Siy <joan@teamcodeflux.com>
Updated Guest scaffolded CRUD

Additional fields were added to guest:
- registered
- assigned seats

Signed-off-by: Joan Tiffany Siy <joan@teamcodeflux.com>
Fixed tabbing
Updated seeds and schema with new database changes
Nested guests within events
Updated views to make them look pretty

Added tabs in event show page for guests and
table.