Merge pull request #282 from vbatts/layer_tweaks

layer: add use of "entries" for "files" in tar

Author: jonboulle

layer.md

@@ -23,7 +23,7 @@ Removals are represented using "[whiteout](#whiteouts)" file entries (See [Repre
 
 ### File Types
 
-Throughout this document section, the use of word "files" includes:
+Throughout this document section, the use of word "files" or "entries" includes:
 
 * regular files
 * directories