- query for all docs, return document name
- nocache for diff()
- find only within `accept_range` ranges in DocumentClass.diff()
- range generators for bool and dates
- if not completed populate (but commit happened) was aborted, the rest of populate will be skipped next populate
- (?) make populate in spawned job
- upload blobs by external url
- limit uploaded size, at least for blobs
- (?) hide new docs in IndexProxy
- mime_type while setting blob
- aslo_sync server errors

1.0
===
- IndexProxy should be smarter to take into account sorting of cached documents
- i18n for SN content
