Add fig parameter to plot2d.jl

Author: ufechner7

examples/plot2d.jl

@@ -5,7 +5,7 @@ x0 = 2.0
 z0 = 0.0
 for t in 0:0.1:5
     global x0, z0
-    plot2d([[1,0,0], [x0,0,z0]], t; segments=1)
+    plot2d([[1,0,0], [x0,0,z0]], t; segments=1, fig="2d plot")
     x0 += 0.1; z0 += 0.1
     sleep(0.1)
 end