* Make aesPassword option for wallet config
* Add to docs
* Make AesPassword optional
* Small touchups
* Fix for oracle server
* Fix docs
* Increase code coverage
* Introduce 'FilterSyncMarker' to ChainApi, make it clearier what exactly the (Int,DoubleSha256Digest) tuple is returned from ChainApi.nextBlockHeaderRange()
* Fix doc
* Add scaladoc to FilterSyncMarker
* Rebase onto master, fix conflicts to use FilterSyncMarker
* Added crypto project and decoupled BitcoinSLogger from NetworkElement
Decoupled BitcoinSLogger from Factory
Moved NetworkElement into crypto project
Moved Factory and BitcoinSUtil (renamed to BytesUtil) to crypto project
Moved MaskedToString to crypto project
Added BytesUtil to imports and cleaned up CryptoUtil.recoverPoint
Moved the rest of crypto stuff to the crypto project
Moved crypto tests to crypto-test project
* Added documentation for crypto project
* Add wallet creation time for rescans
* Fix docs
* Clean up and add test
* Remove account bday
* Fix compile issue and docs
* Add more chain handler tests
* Use Instant over Long, add docs
* Fix docs
* Add disclaimers to the wallet/key-manager around API breaking changes and limitations of the current iteration of the wallet
* Reword as Ben suggests