Add File::ShareDir::Install to dependencies

Change-Id: I7a46ab0687d828ecfa6617cf542ebab43ce924c1
diff --git a/Readme.pod b/Readme.pod
index f9814a2..342c1e5 100644
--- a/Readme.pod
+++ b/Readme.pod
@@ -70,8 +70,8 @@
 
 =head1 INSTALLATION
 
-C<tei2korapxml> requires L<libxml2-dev> bindings to build. When
-these bindings are available, the preferred way to install the script is
+C<tei2korapxml> requires L<libxml2-dev> bindings and L<File::ShareDir::Install> to be installed.
+When these requirements are met, the preferred way to install the script is
 to use L<cpanm|App::cpanminus>.
 
   $ cpanm https://github.com/KorAP/KorAP-XML-TEI.git