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- added link to Lilith

Escaping is implemented selectively. Cerated a new interface called EscapeUtil.
In particular, FileNamePattern now uses AlmostAsIsEscapeUtil.

See also http://jira.qos.ch/browse/LBCLASSIC-56

  features of the Profiler API

 Code responsible for extracting the string array has been moved into 
 the ThorableToStringArray class. This allows StatusPrinter code
 (in lb-core) to compute string representation of throwables without creating
 a ThrowableInformationConverter (in lb-classic).
 

 Code responsible for extracting the string array has been moved into 
 the ThorableToStringArray class. This allows StatusPrinter code
 (in lb-core) to compute string representation of throwables without creating
 a ThrowableInformationConverter (in lb-classic).
 

- ProfilerRegistry instance are intended to help developers track profilers

 Problem reported by Julia Hu [1].
 
 [1] http://www.qos.ch/pipermail/logback-dev/2008-May/002506.html

 see also 

  http://bugzilla.qos.ch/show_bug.cgi?id=55
  http://bugzilla.qos.ch/show_bug.cgi?id=149
  

- copyright is 2000 to 2008
- other docs changes

- fixed bug 147 which was caused by the user specifying a layout for SyslogAppender. 
  SyslogAppender now disallows the user to set a layout. It also informs the user
  that the action is disallows directing her to an error page.
- updated codes.html in relation to bug 147
- simplified and shortened codes.html 

  on the logback mailing list by Daniel King

[1] http://www.qos.ch/pipermail/logback-user/2008-April/000427.html

- subsequent to discussions on the mailing list, tentatively changing the license to GPL+classpath exception instead of the less clear LGPL+classpath.
  Note that GPL+classpath is the same license terms as JDK 7.