Refactor RippleCalc.cpp:

* Add comments
* Restrict code to 80 colums
* Remove boost::format
* Remove BOOST_FOREACH
* Make members private
* Add ripple_unordered_set to UnorderedContainers.h
* Replace boost::unordered_set with ripple::unordered_set

src/ripple/common/UnorderedContainers.h

@@ -0,0 +1,43 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_UNORDERED_CONTAINERS_H
+#define RIPPLE_UNORDERED_CONTAINERS_H
+
+#include "../../beast/beast/container/hash_append.h"
+
+#include <unordered_map>
+#include <unordered_set>
+
+namespace ripple
+{
+
+template <class Key, class Value, class Hash = beast::uhash<>,
+          class Pred = std::equal_to<Key>,
+          class Allocator = std::allocator<std::pair<Key const, Value>>>
+using unordered_map = std::unordered_map <Key, Value, Hash, Pred, Allocator>;
+
+template <class Value, class Hash = beast::uhash<>,
+          class Pred = std::equal_to<Value>,
+          class Allocator = std::allocator<Value>>
+using unordered_set = std::unordered_set <Value, Hash, Pred, Allocator>;
+
+} // ripple
+
+#endif