types.
** &ENVIRONMENT parameter in macro lambda list is bound first.
** SXHASH on condition objects no longer returns NIL.
+ ** :ALLOCATION :CLASS slots are better treated; their values are
+ updated on class redefinition, and initforms inherited from
+ superclasses are applied.
planned incompatible changes in 0.8.x:
* (not done yet, but planned:) When the profiling interface settles