Fix: The initalisation object was being cloned on init which could ca…

…use a major performance hit if you pass in a large data set into `dt-init data`. The table node and internal API reference also should not be cloned.

* Thank you to B Lyon for spotting this issue and writing it up:
  http://www.nowherenearithaca.com/2015/03/avoiding-performance-gotcha-with-jquery.html

js/core/core.constructor.js

@@ -75,13 +75,14 @@ if ( sId === null || sId === "" )
 
 /* Create the settings object for this table and set some of the default parameters */
 var oSettings = $.extend( true, {}, DataTable.models.oSettings, {
-	"nTable":        this,
-	"oApi":          _that.internal,
-	"oInit":         oInit,
 	"sDestroyWidth": $this[0].style.width,
 	"sInstance":     sId,
 	"sTableId":      sId
 } );
+oSettings.nTable = this;
+oSettings.oApi   = _that.internal;
+oSettings.oInit  = oInit;
+
 allSettings.push( oSettings );
 
 // Need to add the instance after the instance after the settings object has been added