references #13, log processors can be overridden
references #13, log processors can be overridden

added functions to override log processors
- define_log_processors for manipulation of log entry dicts
- define_log_pre_format_hooks to run after all processors
- define_log_renderer to render the log entry
    - this runs after all processors and pre format hooks
- define_log_post_format_hooks to run after log renderer

deep-compute/basescript