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 sample warc and cdx for url-agnostic revisits
add unit test and integration test
resolvingloader: pass callback instead of full cdx server
for use for loading cdx in case of url-agnostic revisit
move to distinct packages: pywb.utils, pywb.cdx, pywb.warc, pywb.util, pywb.rewrite!
each package will have its own README and tests
shared sample_data and install
