Basic Usage
===========
fibonacci_sequence = (0..10).inject([0,1]){|seq, index| seq << seq[-2] + seq[-1]; seq}
data = fibonacci_sequence.each_with_index.to_a # data can be a array of two-value arrays, [[0, 0], [1, 1], [1, 2], [2, 3], [3, 4]]
chart = Graphene::Chart.new
chart.plot(data) # plot, histogram, or bar
chart.to_svg