Correct font size for Serbian localizer, changed credits entry for my…

…self from 'Contrib Programming' to 'Programming' and move myself upwards

data/credits.txt

@@ -59,15 +59,15 @@
 	Bastiaan \"basti_\" Zapf
  Programming
 
+	Tobias \"Tobbi\" Markus
+ Programming
+
 	Duong-Khang \"neoneurone\" NGUYEN
  Contrib Programming
 
 	Richard Smith
  Contrib Programming
 
-	Tobias \"Tobbi\" Markus
- Contrib Programming
-
 	Arvid Norlander
  Level Design
 
@@ -167,7 +167,7 @@
  	Herval Ribeiro (Brazilian Portuguese)
  	Frederic Rodrigo (French)
  	D. J. S. (Hungarian)
-	Slobodan Simić (Serbian)
+ 	Slobodan Simić (Serbian)
  	Liu Sizhuang (Simplified Chinese)
  	Jan Solanti (Finnish)
  	Christoph Sommer (German)