use multi-access-sets
fix call to mas-get-similar, must pass the property name
provide a general mechanism for stripping flow/abstract info from a set of BPs
don't specify that a bpset must be a racket set
actually, we don't want that
debugging crap
Use O(n) filter
Fix type of state-hash-code
Improve efficiency of cfa2 with "partitioned sets"

Partitioned sets are sets which maintain a partition of themselves that can be
accessed in constant time.