Update TeamMap.scala

fixes for Colchester, Galatasaray, Gijón, Basel, and Burton
Draft contributions doc
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Merge pull request #660 from guardian/contributions

Contributions
Merge branch 'master' of github.com:seanclarkeguardian/frontend into seanc-teamname
Fix missing comma
Merge branch 'master' of github.com:guardian/frontend into akka-config