RELEASE 0.4.8 - Use coverage, improve testing and fix issues
============================================================
* Add many unittests and increase coverage > 90%
* Update documentation, docstrings
* Rewrite HDWalletTransaction classes
* Improve bitcoind Service client
* Partially remove blockexplorer support and unittests
* Improve database update scripts, add version numbering

RELEASE 0.4.7 - ECDSA updates and minor fixes
=============================================
* Improve and speed up use of ECDSA cryptography methods
* No private keys in json and dict outputs by default
* Bugfixes, PEP8 fixes and docstring updates

RELEASE 0.4.6 - Use fastecdsa library
=====================================
* Use fastecda library instead of ecdsa
* Still support ecdsa library as fallback and for Windows
* Use RFC6979 deterministic signatures (from fastecdsa)
* Add support and Travis CI tests for Windows OS
* Add new Signature class to manage and create signatures
* Fix some private key generation issues and add extra tests

RELEASE 0.4.5 - Rewrite Wallet, Key and Transaction Classes
===========================================================
* Add support for accounts in Segwit wallets
* Add segwit key import
* Add support for address only wallets
* Fix and update use of key paths in wallets
* Use a single method for creating wallets, mark create_multisig() as obsolete
* Return and use public keys by default
* Add dunder methods, as_dict() and as_json to main classes
* Use Address class in other classes
* Fix issues with key_depths and paths in wallets
* Update network definitions, add segwit WIFs
* Rename account_key and account_multisig_key methods to public_master()
* Performance improvements in encoding
* Many other code cleanups and bug fixes

RELEASE 0.4.4 - Fix utxo and provider issues, add pyscrypt support
==================================================================
* Fix various issues with updating UTXO's
* Add pyscrypt support thanks to @x-falcon
* Fix issues with BlockExplorer and Blockr
* Allow to sign tx with HDKey
* Allow to change wallet key names

RELEASE 0.4.3 - More Segwit fixes
=================================
* Fix various segwit issues, add unittests and update docstrings

RELEASE 0.4.2 - Segwit update
=============================
* Fix issues with Blockchair, BlockExplorer and CryptoID provider
* Calculate vsize, virtual size for segwit transactions
* Add support for SegWit to CLI wallet
* Allow use of user defined key paths
* Support and use BIP45, BIP48, BIP49 and BIP84 key paths
* Allow to import ypub/yprv/zpub/zprv keys
* Fixed fee and transaction size estimation issues
* Fixed litecoind issues thanks to @slush0

RELEASE 0.4.0 - Segwit release
==============================
* Added segwit support
* Added support for Python 3.7
* Add support for Blockchair provider
* Add CLTV and CSV timelock support