Merge branch 'swift5-tests-fix'

Merge pull request #44 from RxSwiftCommunity/custom-caching

Allow to specify cached http methods

Merge pull request #41 from RxSwiftCommunity/customSessionDelegate

Allow to pass custom session delegate

Update readme

Merge pull request #37 from RxSwiftCommunity/swift-4

Swift 4 / RxSwift 4

Add some comments

Merge pull request #32 from RxSwiftCommunity/develop

Update dependencies and readme

Merge pull request #31 from RxSwiftCommunity/http-methods

Add support of HTTP methods

Merge pull request #28 from reloni/develop

Caching

Merge pull request #25 from reloni/develop

Updated to Swift 3