Refactor factories
Remove squeel

Rename Comment.find_by_feed_uids to Comment.find_all_by_feed_uids
Refactor factories and remove default order scope of Feed which
affects the ordering of paper.feeds
Remove defunct ApplicationHelper#logo
Refactor PapersController#show:

* Refactor finding Paper that has versioning suffix
* Using semantic version of deleted, ie deleted?
Refactor PapersController#show (cont.):

* Refactor the finding comments logic
Merge pull request #226 from joneslee85/remove-squeel

Remove squeel
Merge pull request #231 from joneslee85/refactor-factories

Refactor factories
Add spec for Comment
Merge pull request #233 from joneslee85/remove-defunct-helper

Remove defunct ApplicationHelper#logo
Merge branch 'refactor-papers-controller' of git://github.com/joneslee85/scirate3 into joneslee85-refactor-papers-controller
Correct spacing on paper page
Use Rails 4.1+ compatible version of oai gem
Coveralls test coverage metrics
Add code coverage badge