[#449] Add a changelog.md (#453)
[#449] Add a changelog.md (#453)

* Adds an initial CHANGELOG.md, detailing the changes of v1.0.0 onwards

Co-authored-by: Andreas Knöpfle <dbd122ef7b6a09ffecf5db9c9296320f3c94e707@bitcrowd.net>
bitcrowd/bitstyles,bitcrowd/bitstyles,bitcrowd/bitstyles