Motivation:
All the backup systems are either slow or crashing or both on my backup.

Tried duply:
* works but very slow:
```
--------------[ Backup Statistics ]--------------
StartTime 1547198362.85 (Fri Jan 11 09:19:22 2019)
EndTime 1547209509.04 (Fri Jan 11 12:25:09 2019)
ElapsedTime 11146.19 (3 hours 5 minutes 46.19 seconds)
SourceFiles 3065438
SourceFileSize 585041709586 (545 GB)
NewFiles 0
NewFileSize 0 (0 bytes)
DeletedFiles 0
ChangedFiles 0
ChangedFileSize 0 (0 bytes)
ChangedDeltaSize 0 (0 bytes)
DeltaEntries 0
RawDeltaSize 0 (0 bytes)
TotalDestinationSizeChange 111 (111 bytes)
Errors 0
-------------------------------------------------

--- Finished state OK at 12:25:15.000 - Runtime 03:06:43.000 ---
```

Tried restic:
* crashes with OOM



Goals for bakare:
* fast
* using max bandwidth
* memory usage limit
* encryption by default - asymmetric, creates a keypair for you
* deduplication
* fuzzy find by file name in stored files

Implementation:
* hash -> file and file -> hash indexes
* use vfs to store both db and data files, create a new one when old one too big
* start with simple read file -> hash -> encrypt -?> send
* test with randomly created dirs and files, with property based tests and fuzzer