added pod info to Install section

Install section says nothing about it being a Pod.  Pod is much preferable to copying the directory.

README.md

@@ -15,6 +15,10 @@ The easiest way to use BSKeyboardControls is to copy the files in `BSKeyboardCon
 1. In Finder, navigate to your `BSKeyboardControls` directory
 2. Drag the complete directory into Xcode
 
+*OR*
+
+1. Add `pod 'BSKeyboardControls', '~> 2.2'` to your `Podfile`
+
 Usage
 ====================
 
@@ -70,4 +74,4 @@ Next you set up the `- (void)textViewDidBeginEditing:` method of the `UITextView
     	[self.keyboardControls setActiveField:textView];
 	}
 
-Now you are ready to use BSKeyboardControls. For more information on how to use BSKeyboardControls, please see `Example.xcodeproj`.
+Now you are ready to use BSKeyboardControls. For more information on how to use BSKeyboardControls, please see `Example.xcodeproj`.