Add script to scan github api and find branches

Look for branches where a specific commit is in
Add array of projects in config

Set config for all projects in config file
and then pick one
Use fork of php-github-api
Avoid doing an API requests when HEAD == commit
Check closed Pull Requests for commit
Improve scanning order looking at HEAD first

Search for commit at HEAD of all branches,
then look at closed pull requests,
then if still not found start looking at
last 30 commits of all branches, and
finally at last 30 commits of all closed
pull requests.