Plot segments when they finish arriving, not when they start

Remove playlist bitrate lines between simulation runs. Make sure the plot displays scenarios where the link capacity exceeds the maximum bitrate playlist properly.

@@ -191,10 +191,6 @@
               // segment response headers arrive after the propogation delay
               setTimeout(function() {
                 var arrival = Math.ceil(+new Date() * 0.001);
-                results.playlists.push({
-                  time: arrival,
-                  bitrate: +request.url.match(/(\d+)-\d+$/)[1]
-                });
                 request.setResponseHeaders({
                   'Content-Type': 'video/mp2t'
                 });
@@ -204,6 +200,7 @@
                   if (remaining - value.bandwidth <= 0) {
                     // send the response body once all bytes have been delivered
                     setTimeout(function() {
+                      var time = Math.ceil(+new Date() * 0.001);
                       if (request.aborted) {
                         return;
                       }
@@ -211,11 +208,15 @@
                       request.response = new Uint8Array(segmentSize * 0.125);
                       request.setResponseBody('');
 
-                      buffered += segmentDuration;
+                      results.playlists.push({
+                        time: time,
+                        bitrate: +request.url.match(/(\d+)-\d+$/)[1]
+                      });
                       // update the buffered value
+                      buffered += segmentDuration;
                       results.buffered[results.buffered.length - 1].buffered = buffered;
                       results.effectiveBandwidth.push({
-                        time: Math.ceil(+new Date() * 0.001),
+                        time: time,
                         bandwidth: player.hls.bandwidth
                       });
                     }, ((remaining / value.bandwidth) + i) * 1000);
@@ -309,7 +310,9 @@
       }));
       y.domain([0, Math.max(d3.max(data.bandwidth, function(data) {
         return data.bandwidth;
-      }), d3.max(data.options.playlists))]);
+      }), d3.max(data.options.playlists), d3.max(data.playlists, function(data) {
+        return data.bitrate;
+      }))]);
 
       // time axis
       svg.selectAll('.axis').remove();
@@ -330,6 +333,7 @@
         .text('Bitrate (kb/s)');
 
       // playlist bitrate lines
+      svg.selectAll('.line.bitrate').remove();
       svg.selectAll('.line.bitrate')
         .data(data.options.playlists)
       .enter().append('path')