LOGBACK-1069 Added some docs indicating LogbackValve will now attempt to load it's configuration as a resource

Bumping to next development version

Fixed a bug in TimeBasedFileNamingAndTriggeringPolicyBase

Optimization in LogbackMDCAdapter.get(String)

The configuration refers to these as  suite names,  not spec names.

Formatted LogbackValve with code style settings

Fixed timing issue in JettyBasicTest

Optimization: use Collections.emptyMap() in LoggingEvent

fixes viewAsGroovy Link for configurations with styling

* modifies ignore-regex in order to ignore <span> tags correctly

The following unit tests were failing because they were expecting the
logger context to have package data enabled by default, but the default
had been changed to false in 8141f88e.

 * ExtendedThrowableProxyConverterTest.integration
 * RootCauseFirstThrowableProxyConverterTest.integration

This patch explicitly enables packaging data for the test's logger context.

Add japanese translation for logback manuals.

Add XML support to en/disable stacktrace package detail

This prevents developers from attempting to modify event's mdc map. For example by invoking

event.getMDCPropertyMap().put("k", "v");

This fixes LOGBACK-1063 by ricochet.