Update Codebase to C++17 Standard

[Ohisemega]

Update rapidjson to latest version
Remove boost::shared_ptr, boost::optional, boost::bind, boost::mutex, boost::to_string, boost::lexical_caststd::string, boost::function, etc Replace the above boos libraries with std equivalent

[GDYendell]

Could you split the rapid json update into its own commit? The diff is massive and it is probably 95% rapidjson.

[Ohisemega]

Could you split the rapid json update into its own commit? The diff is massive and it is probably 95% rapidjson.

Done!