PR #103 / PR #105 / Patch #105

[matthiasbalke]

This PR combines PR #103, PR #105 and the patch file of PR #105.

PR #103

• refactored the package structure of each slice to have "domain" and "rest" package
• added spring-hateoas and refactored all Resources to extend ResourceSupport.
• replaced mappers with ResourceAssemblers
• made WidgetConfig a sub-resource of Dashboard
• added basic unit tests for all RestController methods
• added Helper classes to work with JSON and to provide ResultMatchers to assert Resources

PR #105

• added a patch for new API to make client work (must be appplied after added support for HATEOAS #103)
  • fixed some tslint rules
  • fixed createWidget.sh
  • using HalJson links now (only one entry point left)

[matthiasbalke]

Override this superclass' "equals" method.
Document this public class.

[matthiasbalke]

SonarQube analysis reported 41 issues

• 7 major
• 34 minor

Watch the comments in this conversation to review them.

9 extra issues

Note: The following issues were found on lines that were not modified in the pull request. Because these issues can't be reported as line comments, they are summarized here:

1. Dashboard.java#L8: Document this public class.
2. Dashboard.java#L16: Document this public constructor.
3. DashboardRepository.java#L19: Document this public constructor.
4. WidgetConfigService.java#L15: Document this public class.
5. WidgetConfigService.java#L22: Document this public constructor.
6. WidgetConfigService.java#L28: Document this public method.
7. WidgetConfigService.java#L32: Document this public method.
8. WidgetConfigService.java#L37: Document this public method.
9. WidgetConfigService.java#L41: Document this public method.