Exclude ndnboost from doxygen
diff --git a/Doxyfile b/Doxyfile
index 76f4e5a..cd86aee 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -700,7 +700,7 @@
 # Note that relative paths are relative to the directory from which doxygen is
 # run.
 
-EXCLUDE                =
+EXCLUDE                = ndnboost
 
 # The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
 # directories that are symbolic links (a Unix file system feature) are excluded