* Visibility settings and annotations to stop warnings when running notary healthcheck.
* Add progress trackers so the warnings about unstarted progress trackers disappear.
* Introduce and check @BelongsToContract annotation
* Fix broken ObligationTests
* TransactionContractConflictException inherits from TransactionVerificationException
* Really fix broken ObligationTests
* Convert fun to val
* Update kdoc on BelongsToContract, simplify contract checking
* Warn in TransactionBuilder if ContractState has no owning contract
* Fix failing tests
* Unseal TransactionVerificationException
* Make contract parameter of TransactionState optional
* Replace exception with a warning for now
* Update api-current to permit @BelongsToContract annotation to be added
* cosmetic tweaks
* Throw IllegalArgumentException, not NPE
* Throw IllegalArgumentException, not NPE
* Moved notary healthcheck
* Rename directories and fix up build
* Moved notary healthcheck to tools
* Fix up gradle files and move long running tests to integration-test
* Add copyright headers
* Remove obsolete resource
* Break up large `call()` function, move helpers to be private in companion object
* Move ScheduledCheckFlow to its own file
* Docs etc.
* Code review: Replace magic literals by constants, enums, etc.
* Delete Readme.md (the content will be available in documentation)
* Slight refactoring of the handling flows.
* Publishing
* Fix test
* Add missing artifactory dependency
* Small documentation fixes
* Typo
