change collaborators -> contributors
retrieve org members and change is_collaborator? to is_admin?
fix travisci issue by whitelisting codeclimate 
in spec_helper

https://travis-ci.org/despo/24pullrequests/builds/32662953
update bugsnag
Merge pull request #613 from despo/update-about

Update about
Upgraded rails to 4.1.5
Gem updates
update gems