add Ox.LoadingScreen and Ox.ImageElement, update CSS

source/Ox.UI/js/Core/ImageElement.js

@@ -0,0 +1,54 @@
+'use strict';
+
+Ox.ImageElement = function(options, self) {
+
+    self = self || {};
+    var that = Ox.Element({}, self)
+        .defaults({
+            height: 0,
+            src: '',
+            width: 0
+        })
+        .options(options || {})
+        .update({
+            height: setSizes,
+            src: loadImage,
+            width: setSizes
+        })
+        .addClass('OxImageElement');
+
+    self.$screen = Ox.LoadingScreen({size: 16}).appendTo(that);
+
+    loadImage();
+    setSizes();
+
+    function loadImage() {
+        if (self.$image) {
+            self.$image.off({load: showImage}).remove();
+        }
+        self.$image = $('<img>')
+            .one({load: showImage})
+            .attr({src: self.options.src});
+    }
+
+    function setSizes() {
+        var css = {
+            width: self.options.width,
+            height: self.options.height
+        };
+        self.$screen && self.$screen.options(css);
+        css = Ox.map(css, function(value) {
+            return value + 'px';
+        });
+        that.css(css);
+        self.$image.css(css);
+    }
+
+    function showImage() {
+        self.$screen.remove();
+        self.$image.appendTo(that);
+    }
+
+    return that;
+
+};