Further refactoring of TimeBasedRollingPolicy. Most of the work
related to triggering has moved into an interface called
TimedBasedFileNamingAndTriggeringPolicy. Related to LBCORE-61.

The file attribute in RollingFileAppender is honored once again. This
reverts the changes in revision 2376. Relevant tests in
TimeBasedRollingTest have been resuscitated.
	

moved a new class called DefaultTimedBasedTriggeringPolicy. Related to LBCORE-61.

The File attribute of RollingFileAppender is _now_ ignored! As a consequence, 
3 tests in TimeBasedRollingTest have been removed/disabled.

WARNING: ongoing and unpolished work.

- added copyright notice

nameOfCompressedFile strings are no longer constructor parameters but
parameters to the compress() method. This results in shorter code.

 
  It was surprisingly difficult to write a test case where a NoClassDefFoundError was thrown

  See also http://jira.qos.ch/browse/LBCLASSIC-125

- added a new test case (which does not yet compile)

- added a new test case (which does not yet compile)

Fixes LBCLASSIC-143

- added performance testing concerning ReconfigureOnChangeFilter (ongoing work)
  
  Related to LBCORE-59

This implementation checks for changes in the config file 
every N seconds, where N is a user specified parameter. However, as a 
performance twist, the check is performed every 16 logging events.

It's still ongoing work

This implementation checks for changes in the config file 
every N seconds, where N is a user specified parameter. However, as a 
performance twist, the check is performed every 16 logging events.

It's still ongoing work

  file change, related to LBCORE-59

  file change, related to LBCORE-59