feature(server): Redirect port 80 calls to port 443.

fixes #799
Merge pull request #830 from mozilla/issue-799-http-to-https

feature(server): Redirect http calls to https.
Release v0.9.0
refactor(l10n): split string to make l10n easier
chore(l10): update string templates
Merge pull request #886 from mozilla/update-string-templates

Update string templates

I give this PR an r+. Thanks @zaach!
Asynchronous rendering.
Create two types of rendering, synchronous and asynchronous. Asynchronous can be used to check for prerequisites/errors before printing the template. Async is opt in.