Fix and extend documentation

Change-Id: Ib060ae2b29c800cef01e70fde08a2e2a42a84ff8
diff --git a/script/tei2korapxml b/script/tei2korapxml
index 2b2c6da..fe815fb 100755
--- a/script/tei2korapxml
+++ b/script/tei2korapxml
@@ -1357,9 +1357,9 @@
 
 =over 2
 
-=item B<--base|-b>
+=item B<--root|-r>
 
-The base directory for output. Defaults to C<.>.
+The root directory for output. Defaults to C<.>.
 
 =item B<--help|-h>
 
@@ -1369,6 +1369,17 @@
 
 Print version information.
 
+=item B<--tokenizer-call|-tc>
+
+Call an external tokenizer process, that will tokenize
+a single line from STDIN and outputs one token per line.
+
+=item B<--use-intern-tokenization|-ti>
+
+Tokenize the data using two embedded tokenizers,
+that will take an I<Aggressive> and a I<conservative>
+approach.
+
 =back
 
 =head1 COPYRIGHT AND LICENSE