Added the choices position and get_posititons_info to graph controller. Right now...

Added the choices position and get_posititons_info to graph controller. Right now, since
the graph graphs a different set of data for each candidate, the data function has to be
called multiple times and I'm not sure how to do it/if it's possible within the class
definition. As such, I've defined everything within the choices_position method for now.
I'll be trying to figure out the kinks next. Overall, the graph is very  confusing and
might not be very useful in the end, but the data it uses is.