Revisiting ruby sample usage
forget_memoziations should also forget the memoized delimiter
Added Manager.forget_cached_log_levels
Updated Ruby quickstart example
Removed legacy code related: getters/setters for the formatter_class
Replace CallerFormatter with formatter_caller_enabled = true
LOG_LEVEL_NOTICE was missing
- Update readme
- Bump upcoming version number to 2.0.0
Reworked Formatter.construct_formatted_message.   Having all the logic cleaned up and within a single method should boost performace.  Rerunning the profiler suggests that is the case.