Merge pull request #2003 from keybase/jzila/KBFS-3873-archive-kbfs-repo

add comments to say why we broke the build

Merge pull request #2002 from keybase/jzila/KBFS-3873-archive-kbfs-repo

Break the build

Change README to reflect that this repo is archived.

Merge pull request #1994 from keybase/jzila/fix-git-test

Revert "build PR-609"

Merge pull request #1997 from keybase/taruti/libkbfs-err-ignored-2

libkbfs: Do propagate errors correctly

if we're in singleop mode, allow the block retrieval queue to use a local prefetch status cache in lieu of the disk block cache

build PR-609

favorites/kbfs_ops: refresh edit histories on added favorites

favorites: add logger

favorites: refactor disk cache to leveldb

favorites: create directory for favorites disk cache