BubbleTree as a jquery extension.

This also includes big changes to the existing bar chart along with minor modifications to the dailybread and treemap and standard ways to interface with colors.
The aggregator is also now a constructor.
This is quite the commit eh?

Author: Tryggvi Bjorgvinsson

Gruntfile.js

@@ -15,6 +15,11 @@ module.exports = function(grunt) {
 		    'lib/vendor/underscore.js',
 		    'lib/vendor/accounting.js',
 		    'lib/vendor/thejit-2.js',
+                    'lib/vendor/vis4.js',
+                    'lib/vendor/jquery.history.js',
+                    'lib/vendor/Tween.js',
+                    'lib/vendor/bubbletree/2.0/bubbletree.openspending.js',
+                    'lib/vendor/jquery.qtip.min.js',
 		    // Source files for openspendingjs' utilisation library
 		    'src/utils/*.js',
 		    // Source files for openspendingjs' jquery widgets