WRT *BooleanArray

[Leopold Toetsch]

*) the resizable variant is heavily borked WRT allocation size
   fixes welcome
*) I don't think that *BooleanArray should support:

  set P0[0], 3.2
  set P0[1], "foo"
  set P0[2], P1

nor

  set N0, P[0]
  ...

et al. I think, if you use a BooleanArray with compact storage you are 
knowing why and don't need automatic conversion to/from float, string, 
nor PMC.

What do you think?
leo