Logger

Main features of the “ideal c++ logger”:

1. Clean structure of code without additional dependencies.
   It should be easy to include logger as a static library with a few files
2. Logger should be configurable:
   • Trace source: file/console
   • Retention: time and file size
   • Output format: date, code line, context
3. Should be as much asynchronous as possible.
   Ex.: all flashing to files should be processed at the background thread
4. Smart line termination processing