fixed gitignore to reinclude wrongly ignored frontend libraries

frontend/lib/flot/jquery.flot.flatdata.js

@@ -0,0 +1,47 @@
+/* Support for flat 1D data series.
+
+A 1D flat data series is a data series in the form of a regular 1D array. The
+main reason for using a flat data series is that it performs better, consumes
+less memory and generates less garbage collection than the regular flot format.
+
+Example:
+
+    plot.setData([[[0,0], [1,1], [2,2], [3,3]]]); // regular flot format
+    plot.setData([{flatdata: true, data: [0, 1, 2, 3]}]); // flatdata format
+
+Set series.flatdata to true to enable this plugin.
+
+You can use series.start to specify the starting index of the series (default is 0)
+You can use series.step to specify the interval between consecutive indexes of the series (default is 1)
+*/
+
+/* global jQuery*/
+
+(function ($) {
+    'use strict';
+
+    function process1DRawData(plot, series, data, datapoints) {
+        if (series.flatdata === true) {
+            var start = series.start || 0;
+            var step = typeof series.step === 'number' ? series.step : 1;
+            datapoints.pointsize = 2;
+            for (var i = 0, j = 0; i < data.length; i++, j += 2) {
+                datapoints.points[j] = start + (i * step);
+                datapoints.points[j + 1] = data[i];
+            }
+            if (datapoints.points !== undefined) {
+                datapoints.points.length = data.length * 2;
+            } else {
+                datapoints.points = [];
+            }
+        }
+    }
+
+    $.plot.plugins.push({
+        init: function(plot) {
+            plot.hooks.processRawData.push(process1DRawData);
+        },
+        name: 'flatdata',
+        version: '0.0.2'
+    });
+})(jQuery);