1) better integration to automake/autoconf/configure...
   The rules are:
   * by default look at -ltcl and -ltk
   * you can specify --with-tcl and --with-tk to use
     different versions, e.g. you can use --with-tcl=tcl80
     and --with-tk=tk80 to use them.
   * if your system has a dl library, it uses it, otherwise
     not.  This may cause problems if you have a -ldl, but
     your tcl library doesn't need it :(  There'll probably
     be a --with-tcldl=no someday

2) make a few arrays bigger, particularily in the PDB interface.

3) type most of the numeric returns from the PDB, e.g.
   a proc that returns a layer now returns `layer-#' instead
   of just `#'.  This may cause problems for scripts that
   get an array and then iterate over it. (as in gimp-list-images
   or similar)

4) consolio is now based on Jeff Hobbs `tkcon', much better than
   the older one.  And the license is much less restrictive.

5) The switch to tkcon unveiled several errors with the internal
   packages, so I fixed most of them.  Now sub-interpreters
   can use the same PDB interface as the ``parent'' interp.
   I should be able to make something akin to the script-fu
   mechanism out of this... (someday)