Adds graph for progress of error over generations

modified:   projects/project.py
modified:   wica/static/coffee/project_weights.coffee
modified:   wica/static/css/application.css
new file:   wica/static/css/jquery.jqplot.min.css
new file:   wica/static/js/jqplot.canvasAxisLabelRenderer.min.js
new file:   wica/static/js/jqplot.canvasTextRenderer.min.js
new file:   wica/static/js/jquery.jqplot.min.js
modified:   wica/static/js/project_weights.js
modified:   wica/templates/project_weights.jinja