Create linkStacktrace.js

The OAuth token thingy and markdown formatting aren’t tested yet because I can’t get authentication to work and my unauthenticated API rate limit has expired.
Create config-sample.php
Create index.php

Rough first draft. I have no idea if OAuth will work that way, and my explanation is probably pretty horrible.
Create .gitignore
Actually return ret
Handle user and repo searches
Ditch PHP oauth, use hard-coded token

That token has no scopes, so I don’t think anyone can do anything
harmful to my account with it
Make requests asynchronously

Otherwise, appending anything to ret in the response handlers won’t do
much...
Don’t gobble line if Github responds non-200