update documentation
annotate and dump dedupe groups
Eliminate IDLE-specific debug code
Delete file1_subhashes.out
Delete file2_subhashes.out
Delete file3_subhashes.out
Delete file4_subhashes.out
Delete file5_subhashes.out
Delete file6_subhashes.out
Delete file_hashes.json
Delete file_subhashes.dedupe.json
Delete file_subhashes.dedupe.json
Delete file_hashes.json
Delete dedupe_design_notes.txt
Delete file_1m_subhashes_sorted.out.zip
Update README.md
Update README.md

fix formatting
Update README.md

fix another typo
merge in changes from original fork