generate atlasoflivingaustralia.github.io authors and contributors dynamically

[mbohun]

The https://atlasoflivingaustralia.github.io/ has at the bottom a authors and contributors section that is currently hard-coded/populated with 8 github usernames; we could try to re-generate this list / populate it dynamically from a GitHub API query result, example:

./githubapi-get.sh \
   $GITHUB_TOKEN \
   /repos/AtlasOfLivingAustralia/travis-build-configuration/collaborators \
   | jq '[ .[] | .login ] | sort'

[
  "CorinnaPaeper",
  "M-Nicholls",
  "NatRB",
  "PeggyNewman",
  "Rita-C",
  "RobinaSanderson",
  "StephanievG",
  "Tasilee",
  "adam-collins",
  "ansell",
  "ben3000",
  "charvolant",
  "chrisala",
  "djtfmartin",
  "hudson-ala",
  "javier-molina",
  "jenkins-ala",
  "kheerand",
  "m-hope",
  "matthewandrews",
  "mbohun",
  "nickdos",
  "patkyn",
  "pbrenton",
  "qifeng-bai",
  "rp-ala",
  "sadeghim",
  "sat01a",
  "sathishala",
  "sbearcsiro",
  "temi",
  "timrobertson100"
]

NOTE:

• this could be done by executing the same query for_each repo and merging the result into one JSON array.
• where $GITHUB_TOKEN was this time a token with repo OAuth scope