Python script for initializing and updating apt debian repo

[mhfowler]

With the -i argument, the setup_debian_repo script installs all the dependencies and initializes config files for the debian repo.

Without the -i argument, the setup_debian_repo script just builds all the microservices and re-adds them to the repo using reprepro.

Future possible todos:

• add a CLI arg to just rebuild and re-add one (or a list) of services, instead of all of them
• Look into a way of using versioning to include a new version of the microservice, instead of just deleting and readding with reprepro

[mhfowler]

Also building peach-web currently fails as it says it needs a version of rust nightly for pear

[mycognosist]

@mhfowler

Beautiful work! I like the way you used jinja for rendering config files with variables - very neat. Nice implementation of idempotency checks too :)

You're welcome to merge at your leisure.

[mhfowler]

Sounds like we will do another PR to use freight instead of reprepro, but I'll still merge this and then can do another PR on top of it