Linked Touring

This is a toggle which turns on or off linked touring.  When two or
more XGobis are running, the projection coefficients of the view of
the data given in one plot window during Tour mode may be broadcast
to the other XGobis if Linked Touring is on and the other XGobis
are set to receive.  (See the help file for the Receive Tour button
on the Tour control panel for more information on receiving.)

There are various types of analyses where this facility is
envisioned as useful. One is to look at identical projections of
two different but comparable data sets; for example, one data set
could be randomly split in two for cross-validation purposes.
Another is to compare two different projection pursuit indices on
the same data set.

This can be set in the XGobi resource file.  The default is

*linkTour:   True
