plot_figure2: Create a set of plots for Figure 2
In robjohnnoble/demonanalysis: Analysis and plotting of demon data

Create a set of plots for Figure 2

1 2	plot_figure2(path, output_filename = NA, file_type = "png", output_dir = NA, trim = -1, cutoff = 0)

`path`	path to data file
`output_filename`	name of output image file
`file_type`	either "pdf" or "png" (other values default to "pdf")
`output_dir`	folder in which to save the image file; if NA then plots are displayed on screen instead
`trim`	how many rows and columns to remove from grids; if trim < 0 (default) then all rows and columns containing NA are removed
`cutoff`	Numeric cutoff; genotypes that never become more abundant than this value are omitted from Muller plots