update README

Author: Behrouz Babaki

README.md

@@ -3,7 +3,7 @@
 
 
 <p align="left">
-	<img src="http://behrouz-babaki.github.io/copkmeans/images/diagram.svg"
+	<img src="https://cdn.rawgit.com/Behrouz-Babaki/COP-Kmeans/gh-pages/images/diagram.svg"
 	     width="200">
 </p>
 
@@ -16,7 +16,7 @@ presented in [[1][1]].
 ## The COP-Kmeans algorithm 
 This is the *COP-Kmeans* algorithm, as described in [[1][1]]:
 
-<img src="http://behrouz-babaki.github.io/copkmeans/images/algo.svg" 
+<img src="https://cdn.rawgit.com/Behrouz-Babaki/COP-Kmeans/gh-pages/images/algo.svg" 
      width="550">
 
 ## Usage