Updated plot function to return a Winston.FramedPlot type rather than the figure number.
This means that the plot objects are all added directly to the plot object, eliminating the need for "hold on" and "hold off."
Returning the FramedPlot object allows the file to be saved with a little more freedom.
Also added a "fontsize" parameter for axes labels.

Signed-off-by: Ted Steiner <tsteiner2@gmail.com>
Added option to plot maps in kilometers rather than meters.
Issue #33.

Signed-off-by: Ted Steiner <tsteiner2@gmail.com>
Updated plotting test.
Fixed typos in plot.jl.
By returning the plot object, we now have access to a lot more data for testing whether plotting is working or not.
Issue #33

Signed-off-by: Ted Steiner <tsteiner2@gmail.com>
Updated documentation for new plotting features.
Added an example showing how to most cleanly save plots.
Changed fontsize to default to 0, and handle this by allowing Winston to choose the axes font sizes for anyone who doesn't really care about it.
Issue #33

Signed-off-by: Ted Steiner <tsteiner2@gmail.com>
Fixed a minor typo in plots doc.

Signed-off-by: Ted Steiner <tsteiner2@gmail.com>
Fixed more minor typos in plotMap docs.

Signed-off-by: Ted Steiner <tsteiner2@gmail.com>
Merge pull request #34 from tedsteiner/plot_enhancements

Plot enhancements.