Add textMetadata function to retrieve metadata via sigle(s)

Change-Id: I34714bce07635732d0534f83a48865d6d64903da
diff --git a/NAMESPACE b/NAMESPACE
index 1efd608..3261a8e 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -47,6 +47,7 @@
 exportMethods(initialize)
 exportMethods(persistAccessToken)
 exportMethods(show)
+exportMethods(textMetadata)
 import(R.cache)
 import(highcharter)
 import(httr)
@@ -71,6 +72,7 @@
 importFrom(dplyr,if_else)
 importFrom(dplyr,mutate)
 importFrom(dplyr,n)
+importFrom(dplyr,relocate)
 importFrom(dplyr,rename)
 importFrom(dplyr,rowwise)
 importFrom(dplyr,select)