Renamed equipment_reservation page, works for both checkout and checkin pages now.
Made it so that the checkout/checkin date could be chosen by the user.
Made it so that dates could be considered under form rules.
Replaced the code that automatically sets dates with code to take it form the UI, format it, then save it.
This database has the change to checkins, checkin_date_time changed to checkin_date.
Added information on how to format dates.