pull out #map_to_context!(context)
delete trailing whitespace
Indexer#to_field arg checking. relevant to #2
Indexer#to_field doesn't accept 1 arg, but still does 2 or 3, relevant to #2
README: mention 2/3 arg variability in to_field
Traject::Indexer#each_record, for processing without specific field destination
forgot each_record test
each_record in README
docs
marc4j_reader.source_encoding supposed to default to BESTGUESS
default to Marc4JReader
Merge branch 'master' into solrj_writer_thread_pool