update copyright and manifest
bugs/5
rename list__array_fold_right -> array_fold_right
explain "identify" field better
explain reason for 'identify' better
initial configuration for Yahoo removal
use example_config as default configuration; --config adds on top
group options into actions & options
unify command line options with config file
move remaining defaults to default_config.pl
add hashset_union_defined
handle unset (i.e. undefined) options correctly
bugs/6
handle undef from failed Try block
lower WARN about ignored img to NOTE
add stream test