Fix typo (ageitgey#183)

Kevin Scott · ageitgey · commit 3b8a16c72497 · 2017-09-20T00:47:22.000-07:00
diff --git a/README.md b/README.md
@@ -80,7 +80,7 @@ See [this example](https://github.com/ageitgey/face_recognition/blob/master/exam
 
 #### Installing on Mac or Linux 
 
-First, make sure you have dlib alreayd installed with Python bindings:
+First, make sure you have dlib already installed with Python bindings:
 
   * [How to install dlib from source on macOS or Ubuntu](https://gist.github.com/ageitgey/629d75c1baac34dfa5ca2a1928a7aeaf)
 
