:mega: ktor 0.9.0 - Package structure reworked - ...

# ktor

[cy]

📣 ktor 0.9.0
- Package structure reworked
- Packages and maven groupId renamed org.jetbrains.ktor -> io.ktor
- Server-related artifacts having ktor-server-* name prefix (ktor-netty -> ktor-server-netty)
- Application Host renamed to Application Engine
- FinalContent renamed to OutgoingContent as opposite to IncomingContent (introduced in 0.4.0)
- Added Application Engine configure facilities so one can specify thread pool size or some engine-specific parameter
- Initial idiomatic ktor HTTP client implementation (artifacts prefixed with ktor-client-*)
- Metrics support, DropWizard integration
- Improve routing API, tune resolution mechanics, hide some implementation details
- ContentNegotiation feature to support variable content on send and receive
- Jackson support
- Experimental pure kotlin application engine on coroutines (CIOApplicationEngine) and CIO-based http client backend
- Improved stability under load
- Status pages processing improvements
- A lot of documentation