update and support Freedom Cash

Merge pull request #2 from monique-baumann/main

update and support Freedom Cash

v1.5.0

add hash function parameter for instantiation

enhance doku

v1.4.0

Update README.md

ready to merkle

v1.3.0

update readme

ready to merkle

v1.2.1

boyscout rule

simplified code

v1.2.0

Merge branch 'main' of https://github.com/michael-spengler/merkle-tre…

ready to merkle

v1.1.1

Update README.md

ready to merkle

v1.1.0

Update README.md

ready to merkle

v1.0.1

Merge branch 'main' of https://github.com/michael-spengler/merkle-tre…

ready to merkle

Merge pull request #1 from distributed-ledger-technology/add-license-1

Create LICENSE