read a set of ballots in .HIL format
readHil.Rdrangevoting.org/TidemanData.html: The data are in a format developed by David Hill. The first line contains the number of candidates and the number to be elected. (Many but not all elections were multi-winner.) In subsequent lines that represent ballot papers, the first number is always 1. (The format was designed for a counting program that treats the first number as the number of instances of the ordering of the candidates on the line.) Next on these lines is a sequence of numbers representing a voter's reported ranking: The number of the candidate ranked first, the number of the candidate ranked second, and so on. The end of the reported ranking is signaled by a zero. A zero at the beginning of the ranking is a signal that the list of ballot papers has ended. Next come the names of the candidates, each in parentheses, as required by the counting program, and finally the name of the election.