Provide change log vs origin

[sluongng]

I was trying to navigate through all the updates you guys made compared to the esty original repo and find it a bit hard as neither the commit messages nor the pull requests list are resourceful.

Could you please provide, and maintain a CHANGELOG.md together with releases?

[yelizariev]

I'll post some description here: https://github.com/itpp-labs/hound/releases