info about md readme

Co-authored-by: Nicola Soranzo <[email protected]>

planemo/shed_lint.py

@@ -163,7 +163,11 @@ def lint_readme(realized_repository, lint_ctx):
         # TODO: filter on TYPE and make this a warning if
         # unrestricted repository - need to update iuc standards
         # first though.
-        lint_ctx.info("No README found skipping.")
+        readme_md = os.path.join(path, "README.md")
+        if os.path.exists(readme_md):
+            lint_ctx.info("Found README in Markdown format, which is not rendered by the Tool Shed, skipping")
+        else:
+            lint_ctx.info("No README found, skipping.")
         return
 
     if readme_found.endswith(".rst"):