Redesign WATCHES.Type to be A-Rec, B-Rec, Location, and Other

Redesign WATCHES.Type to be A-Rec, B-Rec, Location, and Other

Instead of having a different WATCHES.Type for each behavior that does
not have a corresponding follow record, and different types for
feeding station arrivals and feeding station groom scans, have only 2
types.  One for A records and one for B records.  There are also types
for locations and for "other", the latter of which is equalivant to a
B-Record.  Presumeably "other" is used for grad-student data, etc.