added autoresize option and updated documentation

js/uhr.js

@@ -259,6 +259,19 @@
         themeChooser.val(selectedTheme);
         this.options.theme = "";
         this.theme(selectedTheme);
+        if (this.options.autoresize) {
+            $(window).on('resize', function () {
+                var $e = this.element;
+                var $parent = $e.parent();
+                var $window = $(window);
+                var parentWidth = $parent.width();
+                var parentHeight = $parent.height();
+                var windowWidth = $window.width();
+                var windowHeight = $window.height();
+                var size = Math.min(parentWidth, parentHeight, windowWidth, windowHeight) + 'px';
+                setWidth.bind(this)(size);
+            }.bind(this));
+        }
     };
     var setCookie = function setCookie(cookieName, cookieValue) {
         var options = {};
@@ -358,7 +371,8 @@
             theme: uhrGlobals.themes[0].styleClass,
             force: false,
             controls: true,
-            cookiePath: undefined
+            cookiePath: undefined,
+            autoresize: true
         },
         "start": start,
         "stop": stop,