MEDIUM: lua: lua integration in the build and init system.

This is the first step of the lua integration. We add the useful
files in the HAProxy project. These files contains the main
includes, the Makefile options and empty initialisation function.
Is is the LUA skeleton.
diff --git a/include/types/hlua.h b/include/types/hlua.h
new file mode 100644
index 0000000..d1aa235
--- /dev/null
+++ b/include/types/hlua.h
@@ -0,0 +1,6 @@
+#ifndef _TYPES_HLUA_H
+#define _TYPES_HLUA_H
+
+#include <lua.h>
+
+#endif /* _TYPES_HLUA_H */