Use or-equal. spelling error
Update attachment.rb, set back S3/Heroku behavior
room refresh issue fix
Create Contributors.md
Link authors to github account
Merge pull request #275 from donthorp/link-contributors

Link authors to github account
Merge pull request #273 from flashharry82/#256

room refresh issue fix #256
Merge branch 'master' of https://github.com/keyvanfatehi/kandan into keyvanfatehi-master
closes #261
Merge pull request #263 from pifleo/patch-1

Update attachment.rb, set back S3/Heroku behavior