Added ChangedEvent.
diff --git a/Makefile.in b/Makefile.in
index 22224b4..26569c9 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,4 +1,4 @@
-# Makefile.in generated by automake 1.13.3 from Makefile.am.
+# Makefile.in generated by automake 1.14 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994-2013 Free Software Foundation, Inc.
@@ -165,6 +165,7 @@
 	ndn-cpp/transport/tcp-transport.lo \
 	ndn-cpp/transport/transport.lo \
 	ndn-cpp/transport/udp-transport.lo \
+	ndn-cpp/util/changed-event.lo \
 	ndn-cpp/util/dynamic-uchar-vector.lo
 libndn_cpp_la_OBJECTS = $(am_libndn_cpp_la_OBJECTS)
 PROGRAMS = $(bin_PROGRAMS)
@@ -529,6 +530,7 @@
   ndn-cpp/transport/transport.cpp ndn-cpp/transport/transport.hpp \
   ndn-cpp/c/transport/socket-transport.h ndn-cpp/c/transport/udp-transport.h ndn-cpp/transport/udp-transport.cpp ndn-cpp/transport/udp-transport.hpp \
   ndn-cpp/util/blob.hpp \
+  ndn-cpp/util/changed-event.cpp ndn-cpp/util/changed-event.hpp \
   ndn-cpp/util/dynamic-uchar-vector.cpp ndn-cpp/util/dynamic-uchar-vector.hpp \
   ndn-cpp/util/signed-blob.hpp
 
@@ -585,8 +587,8 @@
 $(am__aclocal_m4_deps):
 
 config.h: stamp-h1
-	@if test ! -f $@; then rm -f stamp-h1; else :; fi
-	@if test ! -f $@; then $(MAKE) $(AM_MAKEFLAGS) stamp-h1; else :; fi
+	@test -f $@ || rm -f stamp-h1
+	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) stamp-h1
 
 stamp-h1: $(srcdir)/config.h.in $(top_builddir)/config.status
 	@rm -f stamp-h1
@@ -783,6 +785,8 @@
 ndn-cpp/util/$(DEPDIR)/$(am__dirstamp):
 	@$(MKDIR_P) ndn-cpp/util/$(DEPDIR)
 	@: > ndn-cpp/util/$(DEPDIR)/$(am__dirstamp)
+ndn-cpp/util/changed-event.lo: ndn-cpp/util/$(am__dirstamp) \
+	ndn-cpp/util/$(DEPDIR)/$(am__dirstamp)
 ndn-cpp/util/dynamic-uchar-vector.lo: ndn-cpp/util/$(am__dirstamp) \
 	ndn-cpp/util/$(DEPDIR)/$(am__dirstamp)
 
@@ -940,6 +944,7 @@
 @AMDEP_TRUE@@am__include@ @am__quote@ndn-cpp/transport/$(DEPDIR)/tcp-transport.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@ndn-cpp/transport/$(DEPDIR)/transport.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@ndn-cpp/transport/$(DEPDIR)/udp-transport.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@ndn-cpp/util/$(DEPDIR)/changed-event.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@ndn-cpp/util/$(DEPDIR)/dynamic-uchar-vector.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@tests/$(DEPDIR)/test-encode-decode-data.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@tests/$(DEPDIR)/test-encode-decode-forwarding-entry.Po@am__quote@
@@ -1130,10 +1135,16 @@
 	$(am__post_remove_distdir)
 
 dist-tarZ: distdir
+	@echo WARNING: "Support for shar distribution archives is" \
+	               "deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
 	tardir=$(distdir) && $(am__tar) | compress -c >$(distdir).tar.Z
 	$(am__post_remove_distdir)
 
 dist-shar: distdir
+	@echo WARNING: "Support for distribution archives compressed with" \
+		       "legacy program 'compress' is deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
 	shar $(distdir) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).shar.gz
 	$(am__post_remove_distdir)