* Support for building with msvc 2019
* Support for mingw gcc 8.1.0
* Support noexcept for clang 6.0
* micro_http: use pool of worker threads
* Support building on Ubuntu 18.04
* Update Catch to v1.12.0
* Switch back to sprintf for compatibility
* Auth: Refactor micro_http a little
* Auth: refactor HttpMessage; add Syslog support
* Wrote a .spec file for building RPM