Describe how to use the component with swift (closes #34)

Author: serejahh

README.md

@@ -50,6 +50,8 @@ Copy all files from `YALContextMenu` folder to your xcode project.
 
 ## Usage
 
+### Objective-C
+
 You are welcome to see the sample of the project for fully operating sample in the Example folder.
 
 * Add folder YALContextMenu to your project.
@@ -121,6 +123,14 @@ withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
 }
 ```
 
+### Swift
+
+You should add the following line to your bridging header:
+
+``` objective-c
+@import ContextMenu_iOS;
+```
+
 ## Customisation
 
 To customise menu items side position you can specify a 'menuItemsSide' property. When it set to 'Right' the first cell will be opened from right to left and selected cell will be closed vice versa and when it set to 'Left' the first cell will be opened from left to right and selected cell will be closed vice versa. Default - Right.