[logback-dev] Connection logic moved to ConnectionRunner class

Hi Carl, In the 'connectionRunner' branch (a sub-branch of 'serverSide'), I have modified AbstractSocketAppender to delegate most of the connection logic to ConnectionRunner. There are few minor differences in behavior but otherwise, the code is the same only DRYer. The next step is to have SocketReceiver to use ConnectionRunner. After that, I'll tinker with the SocketFactory code to allow user-specified timeout for connection attempts. The current timeout seems to be OS specific (1000 ms on Windows). See the pull request [1] for more details. [1] https://github.com/qos-ch/logback/pull/123 -- Ceki 65% of statistics are made up on the spot