tests to run with a server in a different jvm

- Modified MockSocketServer so that we can use it to check multiple object, not only LoggingEvent objects

- Added an NOPOutputstream

- Updated client classes accordingly.
- Removed formattedMessage != null check in MessageConverter.
- Removed message formatting calls from Logger.

- Added a corresponding test case.

- Added a LoggingEvent2 to test performance between Serialization and Externalization
- Added the corresponding performance test case.

renamed SocketAppenderTest to SockerAppenderTestApp to free the space for a real SocketAppenderTest unit test class

- A working version of this appender is commited. Reliable tests will follow.
- Minor ignore-list modifications.

- Some attributes of Logger have been set transient

- removed Layout from SocketAppender
- modified configFiles and test

Logger: had to make public method getEffectiveLevel()

added support for patterns "p" and "c" from log4j, respectively equals to "level" and "logger" in logback