Add test `Edgelist_Isic_2`

Trajectories/Tests/tests.json

@@ -8,6 +8,15 @@
 	    "segments.graphml"
 	]
     },
+    {
+	"title": "Edgelist_Isic_2",
+	"command":
+	[
+	    "$src_dir/Trajectories/segments.py",
+	    "$src_dir/Trajectories/Tests/edgelist_Isic_2.csv",
+	    "segments.graphml"
+	]
+    },
     {
 	"title": "Edgelist_Isic_1_nx",
 	"description": "Same as Edgelist_Isic_1, except with networkx instead of graph-tool.",