Added a new bar graph, that counts how many points the borda system of

Added a new bar graph, that counts how many points the borda system of
voting has asssigned to every candidate, it shows the margins fo victory
and loss clearly. Also had to make modifications to the RubyVote libary.
There was an error in BordaVote that prevented it from working correctly,
which has been fixed. Also added an attr_reader to BordaResult for
ranked_candidates. About to delete the Gruff Plugin v 0.1.2 and replace it
with Gruff gem v 0.2.8.