[pstricks] Pstricks-add issues

[Hendri Adriaens]

> ! Undefined control sequence.
> \KV at split ...me \ifx \@tempc \relax \KV at undefined 
>                                                   {#2}{#3}\else \ifx
> \@empty...

graphicx uses keyval. pstricks-add uses xkeyval. Version
1.6 had a small error in preventing keyval to be loaded
again after xkeyval has been loaded. The solution now is
to load all pstricks related packages at the last stage.
Version 1.7 already contains the solution to this bug
and will be launched very soon.

Best,
-Hendri.