Added first pass at support for building TiddlyWiki 2.6.x with TW5

There are still some whitespace and attribute ordering issues, but the
result runs correctly.

tw2/source/tiddlywiki/jquery/plugins/obsolete/jquery.tw.js

@@ -0,0 +1,10 @@
+/*
+jquery.tw.js
+addition of tw 'namespace'
+*/
+(function($) {
+	if(!$.tw) {
+		$.tw = {};
+		$.tw.extend = $.extend;
+	}
+})(jQuery);