* Pulled down work from adaptor-dlc onto master
* Reverted some accidental deletions
* Removed unused import
* Added scaladocs
* Responded to Ben's review
* Added some scaladocs and invariants
* Responded to chris' review
* Responded to more review
* Added some comments
* Start refactoring testkit to allow for specifying a different binary directory than the sbt default
* Fix BitcoindRpcTestUtil
* Add BitcoindRpcTestClient
* Get Scala 2.13.4 compiling
* Fix broken test case, in general use if() else() statements for Vectors rather than pattern match as I am unsure of how to correctly pattern match on Vector0,Vector1,...,Vector6()
* Bump CI to 2.13.4
* OVerride CurrencyUnit.equals() so that it works on Scala 2.13.4, not sure why there was a regression here between Scala versions 2.13.4/2.13.3
* Add explicit unit tests making sure bitcoin/satoshi currency units are equivalent
* Make BitcoinSAyncTest more thread safe and make sure we have all the expected test cases aggregated before we starting reducing over the results
* remove extra code
* Fix scala 2.12.x compile
* Move conversions OracleEventTLV -> {EventDb,EventOutcomeDb} into util files so that they can easily be reused by things that are using bitcoin-s as a library
* Add overloaded alternatives to EventDbUtil.{toEventDbs, toEventOutcomeDbs} that take in a OracleAnnouncementV0TLV
* Introduce ChainHandlerCached which behaves like the old ChainHandler. Now Chainhandler.getBestBlockHeader() will read headers from the database
* Remove ChainHandler.blockchains field, now it's only available in ChainHandlerCached
* De-futurify ChainHandler.fromDatabase()
* Adjust logging
* Patch test case
* Use BlockHeaderDAO.chainTips when getting best header rather thean BlockHeaderDAO.getBlockchains(). Implement a helper method ChainHandler.toChainHandlerCached()
* Fix chain.md,wallet.md
* Make ChainHandler.getBestBlockHeader() consider time of header if chainwork is the same. Make test cases less strict on what header is the best header when both chainwork and time are the same on the eader
* Only execute callbacks on headers that are going to be created in the database, not all headers passed into ChainHandler.processHeadersWithChains()
* Turn up log level again
* Small optimizations, check if we have seen a header before before processing it in ChainHandler.processHeadersWithChains(). Fix FilterSyncMarker.toString(). Use ChainHandlerCached in Node
* Remove ChainHandlerCached in appServer, re-add it in Node.scala
