* Initial commit
* Added extra_headers
* Added freeze() method to ClientRequest which produces a 'read-only' copy of a request suitable for retrying the send operation
* Additional methods for FrozenClientRequest
* Fix
* Increased crates versions
* Fixed a unit test. Added one more unit test.
* Added RequestHeaderWrapper
* Small fixes
* Renamed RequestHeadWrapper->RequestHeadType
* Updated CHANGES.md files
* Small fix
* Small changes
* Removed *_extra methods from Connection trait
* Added FrozenSendBuilder
* Added FrozenSendBuilder
* Minor fix
* Replaced impl Future with concrete Future implementation
* Small renaming
* Renamed Send->SendBody
* add rustls support for actix-http and awc
* fix features conflict
* remove unnecessary duplication
* test server with rust-tls
* fix
* test rustls
* awc rustls test
* format
* tests
* fix dependencies
* fixes and add changes
* remove test-server and Cargo.toml dev-dependencies changes
* cargo fmt
* added Connector to actix-web::client namespace
* updated Connector, renaming service() to finish() and adding docs
* added doc for finish method on Connector
