Allow for multiple input documents as command line args

Change-Id: I1acd812771cb1e224f018ef82623c9a7c3df1f99
diff --git a/Readme.pod b/Readme.pod
index e890733..a587374 100644
--- a/Readme.pod
+++ b/Readme.pod
@@ -8,7 +8,8 @@
 
 =head1 SYNOPSIS
 
-  cat corpus.i5.xml | tei2korapxml - > corpus.korapxml.zip
+  cat corpus.i5.xml | tei2korapxml -tk - > corpus.korapxml.zip
+  tei2korapxml -tk corpus.i5.xml > corpus.korapxml.zip
 
 =head1 DESCRIPTION
 
@@ -93,6 +94,11 @@
 The input file to process. If no specific input is defined and a single
 dash C<-> is passed as an argument, data is read from C<STDIN>.
 
+Instead of using C<-i> input files can also be defined as trailing arguments
+to the command:
+
+  tei2korapxml -tk corpus1.i5.xml corpus2.i5.xml
+
 =item B<--output|-o>
 
 The output zip file to be created. If no specific output is defined,