Clear up what's expected in the comparison.
Put expected eq'n in more alphabetical order.
Separated out boolean_term() code from to_boolean() method.
Changed to_boolean() to take an outside list instead of always
looking at the covers attribute.
Added test for bitstring().
Added ->dc checks. Added bitstring() method.
Removed import of unused function.
Note changes.
Columnstring testing.
Added 06run.t to the list.
Add code to support columnstring attribute; change the 'terms'
fields to 'rw' to allow setting via columnstring.
Note changes