fixes x axis label.
fixes legend. still need legend title and correct y axis.
got legend title right. need correct y axis.
got y axis right
reduces legend to just the entries that are plotted.
actually gets the ids right, rather than printing the indexes to the legend.
eps default.
adds matplotlibrc for latex stuff...
makes graphing easier, all one command
adds more input files
100 years is more informative