Let's get rid of "moustache" – use Jinja and, if possible, pull templates from deploy-tools repo?

Templating Options:

1. have bash call jinja directly (requires Python + Jinja installed - see https://github.com/andreasjansson/envtpl)
2. have user run Docker to run jinja (requires Docker installed - might as well just run Ansible at this point)
3. keep / improve current moustache impl

Sourcing Options:

1. have startup pull from deploy tools
2. have deploy-tools pull from startup
3. external repo that both pull from (submodule? subtree?)

This ticket is complete when we have chosen one of each from the above lists, as well as updated all templates' variable styles to match jinja formatting.