Add linked qrcode: qrlink

Change-Id: I344ae90b5cc6aad9f61ff5ac9e42fe8680af7164
diff --git a/NAMESPACE b/NAMESPACE
index 2d0979e..daf7202 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -4,3 +4,7 @@
 export(posterdown_betterport)
 export(posterdown_html)
 export(posterdown_ids)
+export(qrlink)
+importFrom(qrcode,add_logo)
+importFrom(qrcode,generate_svg)
+importFrom(qrcode,qr_code)