proposed paging for the listers

commented out for now because it didn't work well
The views the listers use don't have sortable keys, since each item can show
up by each kind of value you can search for.  This solution used the startKey
view param to start the view listing at a certain key

We'll need to switch to use a parameter the list function can look at, and
do the sorting/limiting entirely within the list function
fix a bug when processing partial inventories

It was throwing an exeption