Add dat log command

[joehand]

Uses dat-log to log history and metadata. You can run on a local directory with .dat folder or a key, for example:

❯ dat log dat://64375abb733a62fa301b1f124427e825d292a6d3ba25a26c9d4303a7987bec65
1 [put] / 0 B (0 blocks)
2 [put] /README 175 B (1 block)
3 [put] /dat.json 309 B (1 block)
4 [put] /far-manzanar.csv 2.0 MB (31 blocks)
5 [put] /far-minidoka.csv 2.1 MB (33 blocks)
6 [put] /far-poston.csv 3.6 MB (55 blocks)
7 [put] /wra-master.csv 73 MB (1111 blocks)

Log synced with network

Archive has 7 changes (puts: +7, dels: -0)
Current Size: 80 MB
Total Size:
- Metadata 436 B
- Content 80 MB
Blocks:
- Metadata 8
- Content 1232

[joehand]

Might be nice to have mtime in there too.

[okdistribute]

woohoo!