adding a line plot file based on contour_plot. these should be refactored at some point to share functionality.
ahhh, bus
gets kd, sol, disp into output db
linear plot working for 1d perturbations not suited to the contour plot.
got rid of scientific notation in filenames
allows better graph customization
Add sol lim to other components in sol.xml.in.
customizations to graphs easier. perturbation deals more smoothly with 2param perturbation.
added commandline args to line_plot
copied to contour_plot
extraction in grams