Added helper method to failure_queue_name

It was created to remove duplicated logic in template
Changed confirm message in "Clear Failed Jobs"

Had a better confirm message in application.js that I moved to template.
Added confirm message in "Retry Failed Jobs"

Had a confirm message in application.js that I moved to template.
Fixed indentation and changed hash sintaxe to "new sintaxe"
changed scripts js to coffee and improved organization

removed some scripts that is not used more
Merge pull request #39 from marciotrindade/master

Improved js and templates