fix issue where the timestep wasn't being limited in a system with only massless remnants when fixed_timesteps should be triggered

fixed issue where the code got in an infinite loop after the above failure

fix TPAGB issue where massive cores were checked vs MCh just before the TPAGB: we now explicitly check that the star is a TPAGB star to do this

add colour%d option to allow the user to override the ANSI colours

Added Tout and Pringle 1992 magnetic wind loss with multiplier option (default is 0.0, so this wind is off)

now propagate vb flag through nuclear-burning routines

change to stellar structure to only allow thermal pulses if Mc < MCh: this *might* help mint post-CHeB (although the timescales are still all messed up!)

added (optional) checkfuncs for the nucsyn cycles so they are not called unless the temperature and density are in suitable ranges.

macro defining length of GB array was too short (never really mattered, but caused problems in debug)

fixed the isotope loops to skip electrons: this was breaking the molecular weight calculations, and the loops should really be just over the isotopes

renamed the "ordered" isotope loop to be the "forward" loop

removed deprecated nucsyn_update_abundances.c

add tidal option for lambdas

split off MS columns to a .def file, and put the option to change data (e.g. fabs, log10, etc.) in there.

note that CNO and NeNaMgAl are to follow

MINT structure is now allocated as a substructure of the star, which means we can no longer memcpy stardatas and stars when using MINT. The functions copy_star and copy_stardata do this for us, of course, and have been updated appropriately.

fixed up the old nuclear network code, this is work in progress but makes things much more transparent and flexible

fixed the nuclear networks to use enums not macros, and these can be set on the command line

fixed bug in MINT that caused problems when 1-X-Y!=Z. this is a fudge that may fail later!

fixed the nuclear isotopes list so we have light and heavy isotopes, and fixed the many functions that use the heavy elements so they compile (and do nothing) with the heavy elements off.

lists that used to be simple macros

cleaned up builds with/without MINT and NUCSYN

fix issues and improve memory allocation for the various nuclear networks, improved how we handle the GSL vectors and matrices, and improved some of the pointers which are now consts (so can be better optimized)

USE_GSL is now removed: we require GSL in so many places, it makes no sense to have alternative algorithms (which we didn't write anyway!)

fixed a few bugs in the MINT-BSE compatibility layer

updated the MINT merger code to handle angular momentum and mass loss
based on preferences

added non-equilibrium convective core mass and mixing

fixed bug in libbacktrace usage that caused it to segfault when
using the unwind library's functions to unwind a previous segfault's
stack trace.

added luminosity <> Mconv lookup on the MS, so we can simulate mixing of a convective core when accreting

MINT now uses BSE after the MS : note, this is likely to be buggy, there are still some parts of the interface that require writing (e.g. mixing of stars on the MS, also the nucsyn)

changed many function macros to be more robust to avoid variable shadowing

fix bug in the common envelope code where a supernova was triggered when it shouldn't have been, causing a double-free.

note: I introduced Static_Starloop to force the loop over both stars when required. I *think* I got this right so far, but please let me know if there is one I mssed.

fix issue in meson.build when perl is detected but doesn't work

fixed meson bash scripts to return 1 (i.e. fail detectably) when things go wrong in more cases

fixed bug where the star instead of system derivative was used, thus confusing the cbdisc mass loss with artificial mass loss

added logging to test some things for Lewis Whitehouse

with calls to stellar_srtucture_make_massless_remnant :
this is because this function does a lot more than simply set the
stellar type, and a crash case was found that depended on these extra
things being set (like the core masses being set to zero).

added check in convective_envelope_mass_and_radius for the case when there is no radial extent or mass in the envelope (just sets k2=0)

few other code cleanups

fix memory leak associated with disc freeing not happening accidentally (common was passed instead of stardata to remove_disc)

some accountancy: we weren't outputting JSON when the ensemble was deferred, this has now been fixed and is all handled in free_memory() and associated functions

fix issue in comenv where the stellar type of a merged star wasn't being set, and improved CO core logging in a few places

lots of code cleanup to go with this, and a few new functions to perform core options.

fixed a bug in the SNII/Ibc yield calculator which used the He core mass instead of CO core (only in the yield calculation).