binary_range_to_letter_code_list: Convert binary presence/absence codes (1/0) to a list of text area names
Description
Given a row of a tipranges object, converts to a
list of the corresponding name(s). E.g., if the areas
were (A,B,C,D), and the tipranges row had (1
0 1 0), the output statename would be ("A","C").