update contributors

SOURCES/Contributors

@@ -28,9 +28,8 @@ Thank you.
   Trevor Cooper
   Chris Stackpole
   Steven Spencer
-  @NezSez
-  @alangm
-  @lumarel
+  Alan Marshall (@alangm)
+  Lukas Magauer
   Al Bowles (@raktajino)
   Peter Ajamian (@pj)
   Scott Shinn
@@ -45,8 +44,6 @@ Infrastructure and Operations:
   Taylor Goodwill
   Neil Hanlon
   Louis Abel
-  Randolh (@meltro)
-  Patric Roberts
   Mustafa Gezen
 
 Release Engineering/Core:
@@ -60,15 +57,18 @@ Release Engineering/Core:
 
 Security:
   Rob Felsburg
-  Benjamin Agner
   Scott Shinn
 
 Documentation:
   Wale Soyinka
 
 Web/Design:
+  Gabriel Graves
   Michael Kinder
 
 Testing:
-  Trevor Cooper
   Chris Stackpole
+  Trevor Cooper
+  Lukas Magauer
+  Alan Marshall (@alangm)
+  Al Bowles (@raktajino)