Make it possible to plot all the nodes in timestamp_plot

It is quite handy to debug the solver with all the data visible.  Add a
--all flag to support that.

Change-Id: Iba8dd3bdb4c2397afb9e774aa138b8f932e99dda
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/frc971/analysis/in_process_plotter.cc b/frc971/analysis/in_process_plotter.cc
index 5f08e5d..545740d 100644
--- a/frc971/analysis/in_process_plotter.cc
+++ b/frc971/analysis/in_process_plotter.cc
@@ -107,7 +107,7 @@
 
   LineStyle::Builder style_builder = builder_.MakeBuilder<LineStyle>();
   if (options.line_style.find('*') != options.line_style.npos) {
-    style_builder.add_point_size(3.0);
+    style_builder.add_point_size(options.point_size);
   } else {
     style_builder.add_point_size(0.0);
   }