Fix broken JS code and add better Unicode support, JSLint, add txt ext. to README

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2654 eee81c28-f429-11dd-99c0-75d572ba1ddd

extras/server-save/svg-editor-save.js

@@ -1,3 +1,4 @@
-this.saveHandler = function(svg) {
-	$.post("svg-editor-save.php", { svg_data: escape(svg) } );
-});
+/*globals $*/
+this.saveHandler = function(svg) {'use strict';
+	$.post("svg-editor-save.php", {svg_data: encodeURIComponent(svg)});
+};