Version 0.10.0-alpha.4

• Updated public dependencies: futures 0.3, tokio 0.2, bytes 0.5
• Made Builder::listen_with_client take an impl tower_service::Service
• Removed timeout support (attach Tower middlewares to HTTP client if you want a timeout)
• Removed egg-mode and tweetust features
• Removed crate::rt module

This is virtually a release candidate for v0.10. The author does not plan further drastic changes at the moment until the final release (Edit: uh, this was found to be wrong).

Changes that might be made before the final release include:

• Updating a public dependency (waiting for carllerche/string#17 to be released)
• Documentation works (esp. on making use of Tower middlewares to set a timeout)