GEAR-RT: adapt io units
Adapted GEAR RT IO routines to use same units as SPHM1RT so they can use the exact same ICs.
Added a stricter check after reading ICs for unphysical situations.
Adapted GEAR RT IO routines to use same units as SPHM1RT so they can use the exact same ICs.
Added a stricter check after reading ICs for unphysical situations.