Refactored RA for nonglobal logging# Please enter the commit message for your changes. Lines starting

- and added poll_time parameter to receiver section in README (which has already existed but was not documented)

More sensible configuration file defaults, some sections left commented to prevent unnecessary default filtering and/or adding Node info

* --pid_file is now on command line, instead of in cfg file (better supports startup shell scripts)
* filer now supports done_dir, where processed messages get stored instead of removing them
* sender now can opportunistically wait if the number of event files to process is lower than send_events_limit. Governed by owait_* cfg file options

* Shorter example config