Fix date not working on all platforms

I used native js libraries to handle UTC date logic.

content/js/meteorogram/plot/data.js

@@ -5,9 +5,7 @@ var _ = require('underscore');
 
 
 function processData(dataObj) {
-    // plotly doesn't support the 'T' date/time separator or the 'Z' at the end
-    // https://help.plot.ly/date-format-and-time-series/#step-2-entering-dates-and-times-in-plotly-s-grid
-    var dates = _.map(dataObj.timestamps, function(date){return date.replace("T",' ').substring(0, date.length-1)});
+    var dates = _.map(dataObj.timestamps, function(date){return date});
     var allData = {
         dates: dates,
     };