Automatically generate documentation for distribution.

[#62 state:resolved]
diff --git a/Makefile.am b/Makefile.am
index 39ee8e8..6761838 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,7 +7,11 @@
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = libiphone-1.0.pc
 
+EXTRA_DIST= docs
+dist-hook: doc
+
 doc:
+	rm -fr docs
 	doxygen doxygen.cfg
 
 indent: