ISIS-839: fixing RAT errors (missing license headers).
ISIS-839: core updates, moving BackgroundServiceDefault from isis-core-runtime to isis-module-background
ISIS-839: core, updates to comments only for isis-module-background
ISIS-839: fix Reflections discovery of @DomainService for jetty-console, remove "harmless" stack traces when running in jetty:run.
ISIS-839: further fix for Vfs discovery of @DomainService classes

(get rid of noisy/harmless exception stack trace).
ISIS-839: audit, command and publish services all @DomainService ...

... since now in own modules; can use inclusion on classpath as indicator as to whether to register or not.
ISIS-839: updates to simpleapp and todoapp examples for services:

* include isis-module-background as maven dependency (commented out as per others for simpleapp, included for todoapp)
* remove registration of BackgroundServiceDefault in isis.properties, since now a @DomainService
* remove registration of AuditingServiceJdo, CommandServiceJdo, PublishingServiceJdo since now all @DomainService.
ISIS-839: updating simpleapp order of @DomainService's

so that "Simple Objects" comes before "Prototyping" in menu.
ISIS-839: fixing RAT errors for Wicket viewer.
ISIS-833: reverting isis-module-wrapper -> isis-core-wrapper.
ISIS-843: fixing non-serializable stack trace for about page.
ISIS-825, ISIS-544: fix for auto-focus of BigDecimal, also for date fields.
ISIS-839: updating example app .launch files and out-of-date welcome.html and the about/index.html files.

Also new recreate-archetype.sh script.
ISIS-839: adding IntelliJ launch configurations to example apps
ISIS-839: reinstating some material that was pruned from the about/index.html

... specifically the links to navigate to the app itself (!).

Also using HTML encoded chars to avoid accidental replacement when archetype is created from this project.
ISIS-839: recreate-archetype.sh script should automatically commit changes.
[maven-release-plugin] prepare release isis-1.6.0-RC3
[maven-release-plugin] prepare for next development iteration
ISIS-839: updating pom.xml for Wicket viewer to reference non-SNAPSHOT parents.
[maven-release-plugin] prepare release isis-viewer-wicket-1.6.0-RC3