update Directory Reference

Directory dependency graph for update:

Directories
	insert

Files
	delete_user_bins.cpp
	Implements raptor::delete_user_bins.
	dump_index.cpp
	Implements raptor::dump_index.
	insert_user_bin.cpp
	Implements raptor::insert_user_bin.
	raptor_update.cpp
	Implements raptor::raptor_update.
	subtree.hpp
	Provides helpers to traverse and retire subtrees of an HIBF.