And, report match counts from "sel", "thresh", "emph".

Pay attention to emph/see settings.
Get selection working properly.

    selsrc(), seldest(), selname(), seltoken().
"thresh" now accepts "-s 'destexpr'".
Add new selthresh SelOp.

Only use SEL_DEST-initialized pick etc. info.

Next: implement "see" in drawspecks().
Add "picked" callback which gets notified of all pick results.

Make specks_picker() work for either Gview or Plot windows.

Add set-selection features: SelOp bitmasks, etc.

Add set-selection features, including interaction tracing.

This really needs to be done in an intermediate superclass!
All these changes really in previous revision; just missed typing in comments then.

so we can use same function for both.

Hack for gcc 3.0's stdio (#ifdef NEWSTDIO).

but do return the Fl_Plot * so the caller can.

will notice when it changes.

left it around.  Otherwise just nag.  This should only
be a problem if Makefile.in is absent, but let's say
that won't happen.
And, re-run "make depend" if Makefile changes too.

Let parent class handle events too.

Encode blending-status bits in along with the opengl texture id.