doc change: Samples browsing: starter templates and navtree gen support.

Change-Id: I03f5eec1dcb71e96fed2ba0119a0b2c0bba56f49
diff --git a/src/com/google/doclava/DocFile.java b/src/com/google/doclava/DocFile.java
index 9e56235..f699f58 100644
--- a/src/com/google/doclava/DocFile.java
+++ b/src/com/google/doclava/DocFile.java
@@ -157,6 +157,8 @@
         hdf.setValue("more", "true");
       } else if (filename.indexOf("google") == 0) {
         hdf.setValue("google", "true");
+      } else if (filename.indexOf("samples") == 0) {
+        hdf.setValue("samples", "true");
       } else if (filename.indexOf("distribute") == 0) {
         hdf.setValue("distribute", "true");
       } else if (filename.indexOf("about") == 0) {