EST-241: adding some contract tests
EST-243: fixing location of download link

- by upgrading to 1.3.0 of dependency

Also:
- factored out EstatioService as a superclass of the EstatioAppDashboard
- added layout.json for EstatioAppDashboard
- added Dashboard.png
- fixed checkstyle warnings on final parameters
- replaced use of LocalDate.now() with getClockService().now()
EST-245, EST-228: fixing regression, also some checkstyle fixes

per regression:
* LeaseDateInterval.contains(), for open-ended, should return true if date == startDate(), as well as if date > startDate()
* also fix to contract test to account for LeaseTerm's new behaviour in its isCurrent() impl (delegates to a parent WithInterval)