Change reference sorting to name, title, year

Having the year as a toplevel sorting criterium is a little bit
unorthodox and confusing. Use author names instead.

main.tex.php

@@ -153,7 +153,7 @@ if (isset($options["--cv"]))
 
 During my thesis, I contributed to <?php echo $num_publications ?> publications in conference proceedings, <?php echo $num_publications_in_thesis ?> of which are included in this thesis as shown below.
 
-\newrefcontext[sorting=ydnt]
+\newrefcontext[sorting=nty]
 
 <?php echo $sloppy_begin; ?>