internal/blobstore: check content hash when uploading
update dependencies.tsv
Merge pull request #63 from rogpeppe/026-archive-upload-check-hash

internal/blobstore: check content hash when uploading

We can now check the content hash with the new method implemented in juju/blobstore.
Fix the meta archive-size response.
Now the size is wrapped in a struct as required by the spec.
Improve archive size tests.
Merge pull request #65 from frankban/fix-archive-size-response

Fix the meta archive-size response.

Now the size is wrapped in a struct as required by the spec.
store: implement serveArchiveFile API.