added tracer titles

Author: Raghav Dua

algorithm/string/knuth_morris_pratt/substring_search/data.js

@@ -10,11 +10,11 @@ var string = randString (15), substring = randString (5);
 var track = Array.apply (null, Array (substring.length)).map (Number.prototype.valueOf, 0);
 
 var logger = new LogTracer ();
-var trackTracer = new Array1DTracer (),
-	substrTracer = new Array1DTracer (),
-	stringTracer = new Array1DTracer ();
+var trackTracer = new Array1DTracer ('Tracker'),
+	substrTracer = new Array1DTracer ('Substring'),
+	stringTracer = new Array1DTracer ('Major String');
 
 
 trackTracer._setData (track);
 substrTracer._setData (substring);
-stringTracer._setData (string);
+stringTracer._setData (string);