Integrated media in results + Deezer Engine

New "embedded" item for the results, allow to give an iframe to display the media directly in the results.
Note that the attributes src of the iframes are not set, but instead data-src is set, allowing to only load the iframe when clicked.

Deezer engine based on public API (no key).

searx/static/themes/oscar/js/searx_src/element_modifiers.js

@@ -63,6 +63,18 @@ $(document).ready(function(){
         $(this).toggleClass(btnClass);
         $(this).toggleClass('btn-default');
     });
+	
+	/**
+     * change text during btn-toggle click if possible
+     */
+    $('.media-loader').click(function() {
+        var target = $(this).data('target');
+        var iframe_load = $(target + ' > iframe');
+		var srctest = iframe_load.attr('src');
+		if(srctest === undefined || srctest === false){
+            iframe_load.attr('src', iframe_load.data('src'));
+		}
+    });
     
     /**
      * Select or deselect every categories on double clic