Small cleanups:
* Use static_assert where appropriate
* Use std::min and std::max where appropriate
* Simplify RippleD error reporting
[FOLD] Remove Math.h
[FOLD] Remove Range.h
[FOLD] Remove LinkedListPointer
[FOLD] Remove ScopedValueSetter
[FOLD] Remove Win32 Registry Stuff
[FOLD] Remove FileSearchPath
[FOLD] Trim SystemStats down
[FOLD] Remove beast::static_bassert
[FOLD] Remove BinaryEncoding.h
[FOLD] Remove BinaryEncoding
[FOLD] SystemStats
[FOLD] Remove UnsignedInteger/UnsignedIntegerCalc
[FOLD] Use std::string instead of beast::String
[FOLD] Remove gratuitious use of beast::String
[FOLD] Remove gratuitous use of beast::Atomic
[FOLD] Remove beast::Atomic deps from beast::StaticObject
[FOLD] Remove beast::Atomic from LockFreeStack
[FOLD] Remove use of beast::Atomic from many places
[FOLD] Fix a typo, remove beast::bmin and beast::bmax