Split function BINDINGS into two: INITIAL-BINDINGS and FINAL-BINDINGS.
Fixed typo.
Addec compuation of bindings for FOR-AS-ARITHMETIC subclause.
Define methods for INITIAL-BINDINGS and FINAL-BINDINGS.
Compute only initial bindings.
Only initail bindings are necessary for REPEAT-CLAUSE.
Removed function that is no longer needed.
Split computation of bindings into two parts.  Added slots to support new technique.