Adds README notice

abeisgoat · abeisgoat · commit f3e7bb47e2b1 · 2016-05-13T16:52:43.000-07:00
diff --git a/README.md b/README.md
@@ -1,3 +1,6 @@
+# This is a legacy Firebase example (for SDK 2.x.x). You probably want to use one of the up-to-date examples at https://firebase.google.com/docs/samples
+
+---
 
 # Firereader
 

-Original file line number
+Diff line change
@@ @@ -1,3 +1,6 @@ @@
 +# This is a legacy Firebase example (for SDK 2.x.x). You probably want to use one of the up-to-date examples at https://firebase.google.com/docs/samples
++
 +---
 # Firereader