Rake task for Bitbucket import
This is an alternative solution for #156 (closed): develop a rake task.
It wouldn't give users the full independence that we wish, but it'd be simpler to develop, and it could be have some advantages of its own
- Some incrementality. Currently, the initial inner push to the auxiliary Git repository is huge and too much prone to fail. A size hint of the remote repo would be enough for that. We could also retry after a failure in PRs, be it because API rate limits or because we actually fixed a bug (great for tests in development systems).
- it would not need a separate OAuth application if the target happens to be public. This would make treating Hosting Requests much easier.
- it would not require explicit membership of the acting user in the Bitbucket repository
- it could have more options that would be awkward or too crowding for the UI