Mention twin project with right alignment in README

Author: mokagio

README.md

@@ -5,6 +5,8 @@ A `UICollectionViewLayout` implementation that aligns the cells to the left.
 
 <img src="https://raw.githubusercontent.com/mokagio/UICollectionViewLeftAlignedLayout/master/screenshot.png" />
 
+_Check out the twin project [`UICollectionViewRightAlignedLayout`](https://github.com/mokagio/UICollectionViewRightAlignedLayout)_
+
 ## Installation with CocoaPods
 
 ```ruby
@@ -37,4 +39,4 @@ For those of you who like consistency there is an `UICollectionViewDelegateLeftA
 
 ---
 
-Hacked together with passion by [@mokagio](https://twitter.com/mokagio)
+Hacked together with passion by [@mokagio](https://twitter.com/mokagio)