- the contextName attribute in jmxConfigurator is redundant since the
context name can be set with the <contextName> element. Modified
documentation accordingly. This change was triggered by comments made
by Matthias Kretschmar.

- added paragraph about exemptions in license.html

- making sure that everything compiles under JDK 1.5
- upgraded janino dependency to 2.5.10 from 2.4.3

- testing the error status code emitted by OutputStreamAppender when a layout is set instead of an encoder

ClassicTestConstants.JORAN_INPUT_PREFIX

- added getFile method to ResilientFileOutputStream

- added JNDIBasedContextDiscriminator which should work much better than
ContextBasedtiscriminator.

 The console is not ours to close.

- renamed WriterAppender as OutputStreamAppender

- FileAppender now takes an encoder and not a layout

chapter on Encoders. Naming chapters by their number was a bas idea...