Recursively print superclass ivars for ivars commands.

[mrhappyasthma]

This might become too spammy, so perhaps this should be optional or another command?

The class_copyIvarList docs mention explicitly "Any instance variables declared by superclasses are not included."

But this could be done with something like:

id object = <instance>;
while ([object != nil) {
  // Print out ivars and the name of the current class.
  // Print out newline.  

  object = [object superclass];
}