Switched more contributors to their github avatar

Author: raducoravu

publishing/webhelpBlogTemplate/custom.css

@@ -263,7 +263,7 @@ h3.followit{
 }
 
 .author.Sorin_Carbunaru{
-    background-image: url("resources/images/foto-SorinC.jpg");
+    background-image: url("https://avatars.githubusercontent.com/sorincarbunaru");
 }
 
 .author.Radu_Coravu{
@@ -276,19 +276,19 @@ h3.followit{
 
 
 .author.George_Bina{
-    background-image: url("resources/images/foto-GeorgeBina.jpg");
+    background-image: url("https://avatars.githubusercontent.com/georgebina");
 }
 
 .author.Alex_Smarandache{
     background-image: url("resources/images/foto-AlexSmarandache.jpeg");
 }
 
 .author.Alex_Jitianu{
-    background-image: url("resources/images/foto-AlexJitianu.jpg");
+    background-image: url("https://avatars.githubusercontent.com/alexjitianu");
 }
 
 .author.Cosmin_Duna{
-    background-image: url("resources/images/foto-CosminD.jpg");
+    background-image: url("https://avatars.githubusercontent.com/DunaMariusCosmin");
 }
 
 .author.Stefan_Vasile{