Messages Dropped From Appender

[frankreno]

When using the appender, I had an issue where messages were being dropped, usually the last one or 2 messages of the process. Suspect it is due to the buffer flushing interval as to correct I added the following to my code to ensure that the buffer is flushed before my process exits.

LogManager.shutdown();

[rvmiller89]

This is fixed with #29

Version 2.7 adds parameter flushAllBeforeStopping=true (still need to do LogManager.shutdown(); with log4j).