adds handling of three new characters (contributed by Mateusz Łącki)

bibtexbrowser.php

@@ -895,6 +895,9 @@ function latex2html($line) {
   $line = str_replace('\\aa','å', $line);
   $line = str_replace('\\AA','Å', $line);
 
+  $line = str_replace('\\l','&#322',$line);
+  $line = str_replace('\\L','&#321',$line);
+  $line = str_replace('\\k{a}','&#261',$line); 
 
 // clean out extra tex curly brackets, usually used for preserving capitals
   $line = str_replace('}','', $line);