other changes

[stokito]

Final batch of changes with install improvements.

For now until you didn't merged I made a fork https://github.com/stokito/pyrite

I created Ubuntu PPA https://code.launchpad.net/~stokito/+archive/ubuntu/utils You can install with

sudo add-apt-repository ppa:stokito/utils
sudo apt update
sudo apt install pyrite-crypt