Update js files

jquery.flot.canvas.js

 /* Flot plugin for drawing all elements of a plot on the canvas.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 Flot normally produces certain elements, like axis labels and the legend, using

jquery.flot.categories.js

 /* Flot plugin for plotting textual data or categories.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 Consider a dataset like [["February", 34], ["March", 20], ...]. This plugin

jquery.flot.crosshair.js

 /* Flot plugin for showing crosshairs when the mouse hovers over the plot.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The plugin supports these options:

jquery.flot.errorbars.js

 /* Flot plugin for plotting error bars.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 Error bars are used to show standard deviation and other statistical

jquery.flot.fillbetween.js

 /* Flot plugin for computing bottoms for filled line and bar charts.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The case: you've got two series that you want to fill the area between. In Flot

jquery.flot.image.js

 /* Flot plugin for plotting images.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The data syntax is [ [ image, x1, y1, x2, y2 ], ... ] where (x1, y1) and

jquery.flot.js

 /* Javascript plotting library for jQuery, version 0.8 alpha.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 */

jquery.flot.navigate.js

 /* Flot plugin for adding the ability to pan and zoom the plot.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The default behaviour is double click and scrollwheel up/down to zoom in, drag

jquery.flot.pie.js

 /* Flot plugin for rendering pie charts.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The plugin assumes that each series has a single data value, and that each

jquery.flot.resize.js

 /* Flot plugin for automatically redrawing plots as the placeholder resizes.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 It works by listening for changes on the placeholder div (through the jQuery

jquery.flot.selection.js

 /* Flot plugin for selecting regions of a plot.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The plugin supports these options:

jquery.flot.stack.js

 /* Flot plugin for stacking data sets rather than overlyaing them.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The plugin assumes the data is sorted on x (or y if stacking horizontally).

jquery.flot.symbol.js

 /* Flot plugin that adds some extra symbols for plotting points.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The symbols are accessed as strings through the standard symbol options:

jquery.flot.threshold.js

 /* Flot plugin for thresholding data.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 The plugin supports these options:

jquery.flot.time.js

 /* Pretty handling of time axes.
 
-Copyright (c) 2007-2012 IOLA and Ole Laursen.
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
 Licensed under the MIT license.
 
 Set axis.mode to "time" to enable. See the section "Time series data" in