introduce new axes system, separating the vars lookup and functions
since we're on a separate branch, it is ok to remove this file
renaming to respect plural for vars_functions
no need for new_axes, we make the switch now
no need to populate vars_lookups and vars_functions with observable ids at the time of initialising the axes
implement separate vars_lookups and vars_functions initialisation
adopt array_ids for compatibility as well as fix of stop2, sbot1,2 mc_old lookups
remove plot making as it was and introduce add_vars_lookups
add_vars_lookups is working now
rigurously changed the axes by just defining value
redefined valid axes, which is now used for populating the axes
fix naming: ssicm2 and ssikocm2 do not return log values
remove deprecated handle_vars_function and handle_vars_lookup
the plot making is now working, but only for vars-lookup
fix for error which should not cause the program to exit; implement adding spaces to the managers
fix: library is already defined here
add two comments and add add_vars_fuctions
add add_vars_functions
add add_vars_functions
remove print statements