Add contributing section to README
Add contributing section to README

Day8/re-frame-template,Day8/re-frame-template,jiangts/re-frame-template,Day8/re-frame-template,jiangts/re-frame-template,jiangts/re-frame-template,KurtRMueller/re-frame-template,KurtRMueller/re-frame-template,KurtRMueller/re-frame-template