January 2019 release

New features in this release:

• environment configuration framework;
• logging system now uses hierarchical properties configuration format;
• client sessions in HTTP server connections;
• new redirections HTTP web application;
• new toString<Allocator> functions;
• optional thread local logger allocator using toString<Allocator> functions;
• optional stacktrace support in exceptions;
• changed fromString API to use std::basic_string_view instead of std::basic_string.
• support for CentOS 7.6 with GCC 7;
• draft tutorial added to documentation.

Pending features not yet in this release:

• log rotation;
• WebSocket application framework and documentation;
• WebSocket client;
• HTTP client keep alive;
• tutorial application example.