ace4-1 pick_me_to_call workaround

[Dave Matthews]

In ace4-1, 'Pick_me_to_call xv my.gif' looks for my.gif in whatever
directory the user happened to be in when he started the database, which is
indeterminate.

To work around this, always invoke xace via a script that first chdir's to
the desired directory:

#!/bin/csh
setenv ACEDB /acedb/myowndb
cd $ACEDB/externalFiles
$ACEDB/bin/xace


Thanks to Hector Sanchez for this tip!

- Dave