Added new core component for topic with tid

Added new core component for topic with a specific tid
To use
```javascript
var topicContainer = components.get('topic', 'tid', tid);
```javascript
in a view with more topics / posts

public/src/modules/components.js

@@ -10,6 +10,9 @@ define('components', function() {
 				return $('[component="topic/teaser"]');
 			}
 		},
+		'topic': function(name, value) {
+			return $('[component="topic"][data-' + name + '="' + value + '"]');
+		},
 		'post': function(name, value) {
 			return $('[component="post"][data-' + name + '="' + value + '"]');
 		},
@@ -63,4 +66,4 @@ define('components', function() {
 	};
 
 	return components;
-});
+});