* Pull over test cases, WIP
* Rework ChainHandler.nextBlockHeaderRange() to use hashes rather than heights to very integrity of header chain, add test case
* Modify test case to make sure we are generating the 'heaviest chain work' header as first in the tuple that is used in reorg test cases
* Refactor to helper method called 'findNextHeader()' to make things simpler
* Add scaladoc to ChainHandler.findNextHeader()
* WIP
* Fix bugs in ChainApi.nextBlockHeaderRange(), now return (startHeight,stopHash) rather than (stopHeight,stopHash)
* Get chain handler tests passing, remove genesis filter header/fitler from default chain project fixture, make it a specialized one to have genesis filter header/filter in the database. Use that specialized fixture in ChainHandlerTest for now
* FilterSync work without having the genesis filter and filter header inserted into the database
* fix bug in DataMessageHandler where we were using sendNextGetCompactFilterHeadersCommand rather than using peerMsgSender.sendGetCompactFilterHeadersMessage
* Refactor ChainHandler.findNextHeader() to centralize where chains are fetched
* Address ben's code review
* Create FeeUnitFactory and functions to calculate tx fee rates
* Remove useless override, use factory
* doc
* Scaladocs + use vals
* Fix scaleFactor being set as default value
* Fix maxBy() exception in the case of empty Blockchain in ChainHandler.bestFilterHeaderSearch()
* Add another unit test to CompactFilterHeaderDAO for coverage
* Implement getBestFilterHeader based on a number of block headers that can be passed in as a parameter. These headers can be used to indicate what your current best chain is
* Bring back compiler opts
* Fix compiler error for maxByOption as it isn't in the 2.12 std library
* Implement a context free best filter headers search. The basic strategy is to look at headers in the _future_ of our current best filter header
* Fix bug in sql query were we were doing max chainWork too early on block headers, we needed to filter out headers in our set and _then_ we get the max chain work
* Add more unit tests
* Apply string factory to a bunch of easy things
* Refactor HDPath, ExtKey, and LnTagPrefix to use StringFactory
* Implemen StringFactory on LnHumanReadablePart, ScriptType, ServiceIdentifier
* Implement StringFactory on AesCrypt, NodeUri, AddressTag, PSBT, TxoState
* Fix failing tests, fix website compile
* Apply StringFactory to all ScriptOperations, ChannelState, Script Parsing
