WICKET-4801 BaseWicketTester.executeAjaxEvent only fires one of multiple behaviors bound to a given event
New examples: Made top menu work properly
Added 6.1.1 fixes to changelog
Update parameter name in javadoc
Fix minor typos
WICKET-4804 Add #setStatus(int) in AbstractResource.ResourceResponse
added test for not validating null
Markdown articles added to examples

It is now possible to write Markdown articles for the new Wicket
examples. Using Markdown makes it easier to author an article and keep
a sane document structure.

See the ComponentExamplesPage for its usage. This uses Markdown4j-core
as a dependency for converting the markdown syntax to HTML.
Alert support in markdown, expanded examples
Fix unit tests
Use Args.notNull() to check the breadcrumb listener.
WICKET-4160 Make AbstractAutoCompleteRenderer.renderHeader() and .renderFooter() non-final
WICKET-4806 AjaxEditableChoiceLabel won't close select onblur
WICKET-4771 Submitting value filled in DropDownChoice fails when tinymce textarea is on the page
Merge remote-tracking branch 'upstream/master' into trunk
WICKET-4810 CLONE - BaseWicketTester.clickLink() does not work with a ResourceLink with ResourceReference
WICKET-4810 CLONE - BaseWicketTester.clickLink() does not work with a ResourceLink with ResourceReference
Minor Javadoc improvement.
WICKET-4812 Make SerializationChecker easier for extending so custom checks can be added to it
WICKET-4812 Make SerializationChecker easier for extending so custom checks can be added to it

Minor performance improvements.