LBCORE-158 - fix for interleaved output to System.out when logback is not the only one writing to System.out (typo fix)

LBCORE-158 - fix for interleaved output to System.out when logback is not the only one writing to System.out

- logback-translator now supports XML to .groovy translations

- removed previoulsy deprecated getFirstFilter() method in
  FilterAttachable interface

- minor corrections

- added GEventEvaluator

 Logger class changed to comply with changes in LoggingLocationAware interface
 LoggingEvent changeed to comply with changes in MessgageFormatter
 LoggingEventVO changeed to comply with changes in MessgageFormatter

- test cases related to http://jira.qos.ch/browse/LBCLASSIC-203

http://jira.qos.ch/browse/LBCLASSIC-203

= typo correction in http://logback.qos.ch/manual/configuration.html#fileInclusion

UknownHostException according to Tomasz Nurkiewicz.

- preparing release 0.9.20

  the MDC used in DBAppenderIntegrationTest is suffixed with a random int value
  to avoid collisions

- Merged from http://github.com/nurkiewicz/logback with following changes:

* removed CustomDBNameResolver as joran currently does not support
setters with two arguments

*  Omitted bogus modifications in FileAppenderResilienceTest and
IncludeActionTest

- fest-assert added as a common test dependency

- edits to manual/configuration.html

- additional test cases for conditional processing

  or <include> statement nested <if> statements or <if> nested within
  <include>

- started to add if/then/else support in Joran
- removed duplicate logback-examples/src/main/java/chapters/appenders/onJoran/ folder