added gas spending chart

public/js/controllers.js

@@ -18,6 +18,7 @@ function StatsCtrl($scope, $filter, socket, _, toastr) {
 	$scope.lastBlocksTime = [];
 	$scope.difficultyChange = [];
 	$scope.transactionDensity = [];
+	$scope.gasSpending = [];
 
 	$scope.nodes = [];
 	$scope.map = [];
@@ -157,6 +158,12 @@ function StatsCtrl($scope, $filter, socket, _, toastr) {
 
 			jQuery('.spark-transactions').sparkline($scope.transactionDensity, {type: 'bar'});
 
+			$scope.gasSpending = _.max($scope.nodes, function(node) {
+				return parseInt(node.stats.block.number);
+			}).stats.gasSpending;
+
+			jQuery('.spark-gasspending').sparkline($scope.gasSpending, {type: 'bar'});
+
 			$scope.map = _.map($scope.nodes, function(node) {
 				if(node.geo != null)
 					return {

views/index.jade

@@ -79,6 +79,11 @@ block content
                 span.small-title transactions
                 span.big-details.spark-transactions {{ transactionDensity.join(',') }}
 
+            div.col-xs-3.stat-holder
+              div.row.big-info.chart
+                span.small-title gas spending
+                span.big-details.spark-gasspending {{ gasSpending.join(',') }}
+
             //- div.clearfix
 
           div.col-lg-4