DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-Refactored Undecided to Decided.

DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-introduced _.neg and removed the DFL, JTMS pos/neg fact handle and neg entry point

DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-Added correct handling of NegConstraint for declared masks
-Fixed FH cloning and NegConstraint cloning

DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-Negatable support must be turned on for !_.neg constraint injection