Logging system improvements: can now set logging filter levels with --logger_filter_stdout and --logger_filter_logfile and arguments being for example "-devel,-debug" to turn off devel/debug messages.
Allow using all/-all/+all in new logger filter options.
Add shortcut macro log -> logger_print.
Remove DEVEL macro.
Sync.
Replace DEVEL() macro use with log(LOG(DEVEL)).