add archiveindexer!
archiveindex: use list instead of ordereddict for cdx,
will add customizations later
archiveindexer major refactoring using zlib only
supports warc.gz, arc.gz, warc, arc and optional sorting
outputs cdx 11 but possible to extend to other formats
(additional edge case testing needed)
DecompressingBufferedReader refactoring to support multi-member gzip
Unit tests for indexer, addtional unit tests for bufferedreaders and loaders,
and recordloaders
add cmdline interface with argparse to archiveindexer
add cli interface for archiveindexer expose as 'cdx-indexer'
add tests for cli interface
additional tests for statusheaders
tests: add pathresolver tests for RedisResolver and PathIndexResolver