* Change NodeCallbacks to Future[Unit] s
* Fix compile issue
* Change try to future
* Change Future.sucessful(()) to FutureUtil.unit
* Callback failure handling, callback docs
* Create functions for executing callbacks, make merkleblock a future
* Convert MerkleBuffersTest to BitcoinSAsyncTest
* Fix compiler errors
* Reorder UpdateBloomFilter tests so that txFromWalletP is a success for both calls and the other test does not wait on the promise to complete
* Incoming and Outgoing Transaction Tables
* Remove script sigs for witness txs
* Create parent tx_table for incoming and outgoing txs
* Response to review
* Use isCloseEnough
* Fix test
* Fix rebase error
* Test that tx is tracking all sats correctly
* Constructed simple Bitcoin-S wallet GUI
* Added note about bitcoin-s server in doc
* Removed wallet dep from gui
* Replaced lambdas with constructors for compatibility with scala 2.11
* Fixed after rebase
* Rename BlockHeaderDAO.getNChildren() to BlockHeaderDAO.getNAncestor() as that is what it actually does
* This changes the behavior of BlockHeaderDAO.getNAncestors from the previous implementation which just fetched headers in between two heights, to actually validating the headers that are fetched from the database with Blockchain.reconstructFromheaders()
* Run scalafmt
* Replace BlockHeader.getNAncestors call to Blockchain.reconstructFromHeaders() with Blockchain.connectWalkBackwards() so that we don't do full POW validation from the database, just make sure the headers connect to avoid reorg problems. Also add some more informative logs
* Address Roman's code review
* Added Bouncy Castle fallback to all Secp calls in ECKey.scala
* Fixed bugs and made ExtKey support use of BouncyCastle
* An attempt to add bouncy castle testing to CI
* Responded to review
* De-coupled libsecp256k1 uses from Bouncy Castle uses
* Responded to review
* Add disclaimers to the wallet/key-manager around API breaking changes and limitations of the current iteration of the wallet
* Reword as Ben suggests
* Implement example of starting a neutrino node and example of adding a callback to node.md
Fix port number
* Clean up some names in the example
* Make sure we get the correct bitcoind binary with neutrino p2p support in the example
