Cleanup and simplifications to SHAMap:

SHAMapTreeNode
* Remove SHAMapTreeNode::pointer and SHAMapTreeNode::ref.
* Add std includes necessary to make the header standalone.
* Remove implementation from the SHAMapTreeNode declaration.
* Make clear what part of SHAMapTreeNode is:
  1) Truly public.
  2) Used only by SHAMap.
  3) Truly private to SHAMapTreeNode.

SHAMapItem
* Remove SHAMapItem::pointer and SHAMapItem::ref.
* Add std includes necessary to make the header standalone.
* Remove implementation from the SHAMapItem declaration.
* Make clear what part of SHAMapItem is:
  1) Truly public.
  2) Used only by SHAMapTreeNode.
  3) Truly private to SHAMapItem.

SHAMapSyncFilter
* Add override for SHAMapSyncFilter-derived functions.
* Add missing header.
* Default the destructor and delete the SHAMapSyncFilter copy members.

SHAMapNodeID
* Remove unused mHash member.
* Remove unused std::hash and boost::hash specializations.
* Remove unused constructor.
* Remove unused comparison with uint256.
* Remove unused getNodeID (int depth, uint256 const& hash).
* Remove virtual specifier from getString().
* Fix operator<= and operator>=.
* Document what API is used outside of SHAMap.
* Move inline definitions outside of the class declaration.

SHAMapMissingNode
* Make SHAMapType a enum class to prevent unwanted conversions.
* Remove needless ~SHAMapMissingNode() declaration/definition.
* Add referenced std includes.

SHAMapAddNode
* Make SHAMapAddNode (int good, int bad, int duplicate) ctor private.
* Move all member function definitions out of the class declaration.
* Remove dependence on beast::lexicalCastThrow.
* Make getGood() const.
* Make get() const.
* Add #include <string>.

SHAMap
* Remove unused enum STATE_MAP_BUCKETS.
* Remove unused getCountedObjectName().
* Remove SHAMap::pointer
* Remove SHAMap::ref
* Remove unused fetchPackEntry_t.
* Remove inline member function definitions from class declaration.
* Remove unused getTrustedPath.
* Remove unused getPath.
* Remove unused visitLeavesInternal.
* Make SHAMapState an enum class.
* Explicitly delete SHAMap copy members.
* Reduce access to nested types as much as possible.
* Normalize member data names to one style.

* Change last of the typedefs to usings under shamap.
* Reorder some includes ripple-first, beast-second.
* Declare a few constructions from make_shared with auto.
* Mark those SHAMap member functions which can be, with const.

* Add missing includes

src/ripple/protocol/impl/STLedgerEntry.cpp

@@ -21,6 +21,7 @@
 #include <ripple/basics/Log.h>
 #include <ripple/json/to_string.h>
 #include <ripple/protocol/Indexes.h>
+#include <ripple/protocol/JsonFields.h>
 #include <ripple/protocol/STAccount.h>
 #include <ripple/protocol/STLedgerEntry.h>
 #include <boost/format.hpp>