Elaborate on S3 in README
Elaborate on S3 in README

rajeshrsmail/railscollab,kakra/railscollab,UWC4C/Railscollab,UWC4C/Railscollab,silliemunkie/cpsprojectmanagement,rajeshrsmail/railscollab,kakra/railscollab,silliemunkie/cpsprojectmanagement