option to track box size or type rather than points

[groundwired]

Three main types of tracking we want to support:

1. points - guest can come anytime but gets a number of points per month
2. box size - guest visits on a schedule, gets a recommended box size, which we track
3. no service level tracking - guest visits on a schedule, we track visits but nothing about what we deliver

There is a setting Track Points. If it is set, we ask for and display point usage.
There is a setting for visit limits. If it is set, we warn when the guest has been here too recently.
There are settings for boxes. If they are set, we will track which one the guest received and suggest the right one for the family size. If it is not set, we will hide this functionality.
There are also commodities. If they are not specified, we will hide this functionality as well.