examples: Add very basic consumer/producer apps

Change-Id: I3c80448b3894f0609a15596bf16c8833ab2f8add
diff --git a/Makefile.am b/Makefile.am
index 767081d..748321d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,7 +12,7 @@
 lib_LTLIBRARIES = libndn-c.la libndn-cpp.la
 
 # "make install" will also install the include headers.
-SUBDIRS = include . tools
+SUBDIRS = include . tools examples
 
 if COMPILE_TESTS
   SUBDIRS += tests