Rollbacked to atom requests, with token.

@izuzak Is there any hope to convert an OAuth token to Base64 token that is required to access /<username>.private.atom?token=<token>?
The response is an empty string. If so, how can do that? If not, do we have any alternatives?
Fixed auth for private feeds.

Thanks, @izuzak! :smile:
Bumped version
1.4.0 changelog
Merge pull request #14 from IonicaBizau/back-to-feeds

1.4.0 - Rollback to private feed requests