Check Species Codes for Compliance with a Given Coding
all_codes_allowed(x, coding)A list with two elements: 1) rqmt_ok which is TRUE if
the requirement is fulfilled and FALSE otherwise; 2)
err_message, the body of an error message to be used by the calling
function (mentions all problematic elements of x)
Object of one of the fe_species_id classes or a character
vector
Name of the coding against which x is to be checked. Must
be one of the entries in the column species_coding in the data file
species_codings