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.

Add emphasis controls.

This makes many things easier.

pp_stepper needs to update all windows, not just gview.
H-R diagram toggles...

Increase MAXSTUFF yet again.

emphasis tag.
Use new sfStrDrawTJ (with transform & justification) for text.
Yeow, handle polymax properly -- default == infinity!
Add "vcmap" for per-datafield colormaps.
Enable GL_SMOOTH mode to get texture colors to work right (huh? why do we need to?).
"tfm c"/"tfm w" choose cam vs. world (default) location for object tfms.

have "o2w" transforms that are really interpreted relative to camera space.
Also start adding per-object clip support; this requires change to
subcameras, supplying projection parameters subc_lrbt()
rather than a (clip-dependent) projection matrix.

where ``a = b;  if(a == b) { ... }'' can be false!

rather than a string.

popen() needs "r" not "rb" -- no such thing as binary mode.
kira_open() gets original filename if we can't find it, for error messaging.

Star type is number-encoded, sigh:
	0 = unknown
	1 = ms	Main Sequence
	2 = cd	Compact Dwarf??
	3 = gs	??
	4 = bh	Black Hole
	5 = sg	Supergiant?
	6 = hb	Horizontal Branch