migrate to autotools

Change-Id: Icb1a0a2e39f291ceac5c868d76445799d0ce31f1
diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
index 0000000..5a23107
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,3 @@
+SUBDIRS = \
+	examples \
+	$(NULL)