Factor out ETA logging

Change-Id: Ic8b1600395018aa79701e29a38c4ec22d598337a
diff --git a/DESCRIPTION b/DESCRIPTION
index a25074b..1e47e7a 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -77,4 +77,5 @@
     'misc.R'
     'reexports.R'
     'textMetadata.R'
+    'logging.R'
 Roxygen: list(markdown = TRUE)