Read an oldformat colortable from a connection to a binary file.
readcolortable_oldformat(fh, ctable_num_entries)
named list, the color table. The named entries are: "num_entries": int, number of brain structures. "struct_names": vector of strings, the brain structure names. "table": numeric matrix with num_entries rows and 5 colums. The 5 columns are: 1 = color red channel, 2=color blue channel, 3=color green channel, 4=color alpha channel, 5=unique color code.
file handle
number of entries to read