fix bug in iperf update and improve logging
diff --git a/web/ons-demo/js/flows.js b/web/ons-demo/js/flows.js
index e21af0d..f4506e2 100644
--- a/web/ons-demo/js/flows.js
+++ b/web/ons-demo/js/flows.js
@@ -200,141 +200,6 @@
 	flows.exit().remove();
 }
 
-function startIPerfForFlow(flow) {
-	var duration = 10000; // seconds
-	var interval = 100; // ms. this is defined by the server
-	var updateRate = 2000; // ms
-	var pointsToDisplay = 1000;
-
-	function makeGraph(iperfData) {
-		var d = 'M0,0';
-
-		var now = flow.iperfData.startTime + (Date.now() - flow.iperfData.localNow)/1000;
-
-		if (iperfData.samples && iperfData.samples.length) {
-
-			var lastX;
-			var i = iperfData.samples.length - 1;
-			while (i) {
-				var sample = iperfData.samples[i];
-
-				var x = (1000 - (now - sample.time)*10);
-				// workaround for discontinuity in iperf data
-				if (x < 0) {
-					i -= 1;
-					continue;
-				}
-
-				var y = 28 * sample.value/1000000;
-				if (y > 28) {
-					y = 28;
-				}
-				if (i == iperfData.samples.length - 1) {
-					d = 'M' + x + ',30';
-				}
-
-				// handle gaps
-				// 1.5 for rounding error
-				if (lastX && lastX - x > 1.5) {
-					d += 'L' + lastX + ',30';
-					d += 'M' + x + ',30'
-				}
-				lastX = x;
-
-				d += 'L' + x + ',' + (30-y);
-
-				i -= 1;
-			}
-			d += 'L' + lastX + ',30';
-		}
-		return d;
-	}
-
-	if (flow.flowId) {
-		console.log('starting iperf for: ' + flow.flowId);
-		startIPerf(flow, duration, updateRate/interval);
-		flow.iperfDisplayInterval = setInterval(function () {
-			if (flow.iperfData) {
-				var iperfPath = d3.select(document.getElementById(makeSelectedFlowKey(flow))).select('path');
-				iperfPath.attr('d', makeGraph(flow.iperfData));
-			}
-
-
-		}, interval);
-
-		var animationTimeout;
-		flow.iperfData = {
-			samples: []
-		}
-
-		var lastTime;
-		flow.iperfFetchInterval = setInterval(function () {
-			console.log('Requesting iperf data');
-			getIPerfData(flow, function (data) {
-				try {
-					var iperfData = JSON.parse(data);
-
-//				console.log(iperfData.timestamp);
-
-					// if the data is fresh
-					if (flow.iperfData.timestamp && iperfData.timestamp != flow.iperfData.timestamp) {
-
-						var flowSelection = d3.select(document.getElementById(makeFlowKey(flow)));
-						startFlowAnimation(flowSelection);
-						clearTimeout(animationTimeout);
-						// kill the animation if iperfdata stops flowing
-						animationTimeout = setTimeout(function () {
-							stopFlowAnimation(flowSelection);
-						}, updateRate*1.5);
-
-						var endTime = Math.floor(iperfData['end-time']*10)/10;
-
-						var startTime = endTime - (iperfData.samples.length * interval/1000);
-						// set now on the first buffer
-						if (!flow.iperfData.startTime) {
-							flow.iperfData.startTime = startTime;
-							flow.iperfData.localNow = Date.now();
-						}
-
-						console.log('iperf buffer start time: ' + startTime);
-						if (lastTime && (startTime - lastTime) > updateRate/1000) {
-							console.log('iperf buffer gap: ' + startTime + ',' + lastTime);
-						}
-						lastTime = startTime;
-
-						// clear out the old data
-						while (flow.iperfData.samples.length > pointsToDisplay + iperfData.samples.length) {
-							flow.iperfData.samples.shift();
-						}
-
-						// if the client gets too out of sync, resynchronize
-						var clientNow = flow.iperfData.startTime + (Date.now() - flow.iperfData.localNow)/1000;
-						if (Math.abs(clientNow - startTime) > (updateRate/1000) * 2) {
-							console.log('resynchronizing now: ' + clientNow + ' => ' + startTime);
-							flow.iperfData.startTime = startTime;
-							flow.iperfData.localNow = Date.now();
-						}
-
-						var time = startTime;
-						iperfData.samples.forEach(function (s) {
-							var sample = {
-								time: time,
-								value: s
-							};
-							flow.iperfData.samples.push(sample);
-							time += interval/1000;
-						});
-					}
-					flow.iperfData.timestamp = iperfData.timestamp;
-				} catch (e) {
-					console.log('bad iperf data: ' + data);
-				}
-//				console.log(data);
-			});
-		}, updateRate*.5); // over sample to avoid gaps
-	}
-}
-
 function updateSelectedFlows() {
 	// make sure that all of the selected flows are either
 	// 1) valid (meaning they are in the latest list of flows)
@@ -350,10 +215,8 @@
 			if (flow) {
 				var liveFlow = flowMap[makeFlowKey(flow)];
 				if (liveFlow) {
-					newSelectedFlows.push(liveFlow);
-					liveFlow.deletePending = flow.deletePending;
-					liveFlow.iperfFetchInterval = flow.iperfFetchInterval;
-					liveFlow.iperfDisplayInterval = flow.iperfDisplayInterval;
+					flow.dataPath = liveFlow.dataPath;
+					newSelectedFlows.push(flow);
 				} else if (flow.createPending) {
 					newSelectedFlows.push(flow);
 				} else if (hasIPerf(flow)) {
@@ -395,19 +258,6 @@
 	}
 }
 
-function hasIPerf(flow) {
-	return flow && flow.iperfFetchInterval;
-}
-
-function clearIPerf(flow) {
-	console.log('clearing iperf interval for: ' + flow.flowId);
-	clearInterval(flow.iperfFetchInterval);
-	delete flow.iperfFetchInterval;
-	clearInterval(flow.iperfDisplayInterval);
-	delete flow.iperfDisplayInterval;
-	delete flow.iperfData;
-}
-
 function deselectFlow(flow, ifCreatePending) {
 	if (!flow) {
 		return;