fix so that the mass gain timestep multipliers work properly

updated docs for V2.2.0 release

removed deprecated docs

update pgo.sh script to do status updates, fix a few issues with the latest meson.build

 fixed memory leak on disc append

add ensemble filter output to "binary_c version"

renamed K3 macro similarly

removed some unused "FUDGE" code

fix build issue in timestep_CHeB

add function to test if we're running under Valgrind, and if we are and haven't built with -Dvalgrind=true, bail

rewritten the old Fryer BH mass routines, also to include the Startrack prescription

update ubuntu installer script (work in progress for Python wrapper)

added gcc args for debugging (valgrind, gdb, etc.)

more attempts to clean up timesteps: now check the minimum timestep by default, and have separate macros for when we don't want to

also fixed bug where nucsyn checkfuncs weren't wrapper with NUCSYN

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

updates to meson.build: moved the cflags around a bit to make sure the numerics flags are in the required rather than optional list

sync latest perl mods (binary_grid::C path fix)

fix a few other bugs in handling of MINT <> BSE to prevent recursion (i.e. double calling)

fixed issue where max_stellar_type are not checked before an event