Only call parti_parse_args() if non-CAVE.

"spi fast" -> SPI_PF_AUTO.

toggle-button colors to change.  Lets us (barely) see when
inertia and hrdiagram toggles are selected.

Add new per-particle field, "ismember", to show escapees.

"inertia on/off" and "detach [fullscreen]" commands.

Adds a series of "spi XXX" commands.

in detached mode.

and let postdraw return an int.  Keep looping, re-rendering,
until postdraw returns zero.

and into partiview.cc, using new parti_add_commands hook.

Declare getfloats() (from partibrains.c at the moment).

"where" prints more information.

(Some "kira" commands use kira_set(), which already does this.
Just set "changed" for those which don't.)
Impose a max trail gap (delta time).  Break up trails at time-gaps
exceeding this threshold.

Fix seldest2src(), not even wrong.
Use specks_reupdate() after changing thresh, so the reported
selcount should be right.
specks_rethresh(): keep track of whether anything changed,
and increment st->selseq if so.

the kira-computed smoothed cluster center.

New "kira hrdiag" command allows turning it on/off, setting plot ranges.
"kira int x" is a synonym for "kira int x=x", the common case.
New "sqrtmass" attribute.  "mass" is again in linear, not log units.
Disable kira display if we don't get a valid input file.
XXX Bogusly import getfloats() from partibrains.c; should go in a separate
utility .c/.h file.

both were filled in.

of picked stars.

dynamical->solar mass unit conversion.
If it knows, then "kira massscale" only allows user
to override if user-supplied value ends with "!",
e.g. "kira mscale 600!".

Revert to compatible texture behavior: texture -A is again the default,
use texture -O for "over"-style blending.