Imported revision 172
imported revision 180: Fix for required slot override default ?NONE bug
imported r182: Replacement of API macros with functions
Imported r183: Fixed linkage error for variious setup flags
Imported r184: Moved WatchGlobals global variable to environment data
imported r185: Removed deprecated #defines
Import r186: Updated version history
Imported r187: Modifications to remove warnings
Imported r188: Fixed issue with asserting void values in implied deftemplate facts
Imported r189: Fix for assert with clear bug
Imported r190: Dynamic constraint checking allowed-classes fix
Imported r192: Constructs-to-c fixes with C++ compatibility
Imported r195: Removed PrintInChunks for ancient VMS bug
Imported r196: Minor code formatting changes
Imported r197: Changes for APG update
Imported r198: Deprecated ALLOW_ENVIRONMENT_GLOBALS
Imported r199: Updated EnvDecrementGCLocks for new GC algorithm
Imported r201: progn$ garbage collection bug