Merge pull request #4 from rhyek/fix/nested-shell-env

Keep the shell's values in a nested stackctl, and type sctl in the guide

Merge pull request #3 from rhyek/fix/log-label-width

Line up every log label, and play the docs' terminal screens as text

Merge pull request #1 from rhyek/docs/sdk

Name the SDK in the docs and the README, and release 0.1.1

Order the headless test's lines by what causes them

web says it waits as soon as it is launched; api starts once the first .env read
is done, which can land either side.