Added support for Finagle's configuration items.

Previously, the trinity-core didn't support some parts of Finagle's configuration items, but it was supported.
The class represents the configuration items are the `org.sisioh.trinity.domain.mvc.server.ServerConfig` class. 

The configuration items can also be loaded from the configuration file.The followings is the configuration items.

- maxRequestSize
- maxResponseSize
- maxConcurrentRequests
- hostConnectionMaxIdleTime
- hostConnectionMaxLifeTime
- requestTimeout
- readTimeout
- writeCompletionTimeout
- sendBufferSize
- receiveBufferSize