Dash marker symbol

Author: seanupton

package.json

@@ -36,7 +36,7 @@
     "gulp-uglify": "^1.0.1",
     "gulp-util": "^3.0.1",
     "imports-loader": "^0.6.3",
-    "jsdom": "^1.3.1",
+    "jsdom": "^9.9.1",
     "jshint-stylish": "^0.4.0",
     "karma": "^0.12.23",
     "karma-chrome-launcher": "^0.1.4",

src/scripts/timeSeriesPlot.es6.js

@@ -73,6 +73,12 @@ nv.utils.symbolMap.set('x', function(specifiedSize) {
             'l' + (-size) + ',' + size;
 });
 
+nv.utils.symbolMap.set('dash', function(specifiedSize) {
+    var size = Math.sqrt(specifiedSize) * 1.8;
+    return 'M' + (-size/2) + ',' + 0 +
+            'l' + size + ',' + 0;
+});
+
 nv.utils.symbolMap.set('plus', function(specifiedSize) {
     var size = Math.sqrt(specifiedSize) * 1.8;
     return 'M0,0' +