Merge pull request #1349 from nono/sharing-binaries

docs/sharing.md

pkg/sharing/error.go

pkg/sharing/files.go

pkg/sharing/indexer.go

pkg/sharing/replicator.go

pkg/sharing/replicator_test.go

pkg/sharing/setup.go

pkg/sharing/shared.go

pkg/sharing/sharing.go

pkg/sharing/upload.go

pkg/sharing/upload_store.go

pkg/workers/share/share.go

tests/sharing/Gemfile

tests/sharing/Gemfile.lock

tests/sharing/boot.rb

tests/sharing/lib/bootstrap.rb

tests/sharing/lib/cozy_file.rb

tests/sharing/lib/folder.rb

web/sharings/replicator.go

web/sharings/replicator_test.go