any rolling or triggering policies, then generate an error status message.

- Fixed LBCORE-105 Configuration files placed in jar files will no longer 
  lock the jar file.

degradation in throughput of 10 to 20% (on windows)

Instead of the doAppend method being synchronized, WriterAppender now uses
UnsynchronizedAppenderBase as its super class. Consequently, various converters
can no longer assume that they are invoked from within a synchronized block.
 

- minor refactoring of the code (mostly renaming and moving to different package)

- added remark about log4j no longer being actively developed

had trouble with the old names.

perform threaded computations.

This commit is related to LBCLASSIC-36 as well as LBCORE-97