Add the SPDLOG_USE_WCHAR tweak to enable support for Unicode names on Windows. Refs #111

 console color example

ANSI color sink decorator

Added SQLite3 sink to the solution

Fixed issue #179 (Conflict with Boost.Asio) (by defining FMT_USE_WINDOWS_H=0 in format.h and preventing include of windows.h)

assigned nullptr to _database and _query_stmt upon flushing so that if flush gets called again, will not throw an exception