[logback-dev] The encoder branch merged with master

Hello, This is to inform you that I have merge the encoder branch into the master branch. I am still documenting the changes. In short, WriterAppeder has been renamed as OutputStreamAppender, FileAppender now sub-classing the latter. OutputStreamAppender and sub-classes now take an Encoder instead of a Layout. Contrary to Layouts which simply transform a logging event into a String, an encoder is responsible for writing the actual event or more accurately the representation of the event into the output stream. The role of the enclosing appender now only manages the output stream (opening/closing) but not the actual contents written onto the stream. -- Ceki