Fixed bug in PGcomplexmacros.pl having to do with the lack of a
=cut line in the pod documentation.
The loadMacros eval doesn't fail gracefully when this kind of mistake
occurs. More work needs to be done on loadMacros.
Also changed the _PGcomplexmacros_init subroutine to include the
exporting of variables from Complex.
I think this is what it was supposed to do in any case, but perhaps not.
When using the forking process it was only necessary to export the
variables in the parent.