#109 Unnecessary mkdir Makefile.PL

This attempts to create the nodeballs subdirectory on top of
the one that was already copied to $installDir.

(From Makefile.PL)
$inherited .= " cp -R ./nodeballs $installDir ; \\\n";

# XXX - hack to make install_esite work correctly
$inherited .= " mkdir $installDir/nodeballs ; \\\n";