3.0.1

This release makes old queries incompatible because -f and -c changed

• fix #25
• replaced setup.py with toml

thanks to the idea of #27

• -f is now first snapshot
• -l is now last snapshot
• -a is now all snapshots

conclusion

• -l added (was -c)
• -f functionality changed (was full is now first)
• -a added (was -f)

first means the first snapshot of each file in the specified range
last means the last (latest) snapshot of each file in the specified range