Don't fail if the file is missing
Dragonfly version 0.9.15

To ensure temporary compatibility with Dragonfly. Version 1 has changed
interfaces and this gem needs more work.
Merge pull request #5 from matjack1/master

Dragonfly version 0.9.15
Add rack-cache dependency, needed for Dragonfly
Merge pull request #6 from matjack1/master

Add rack-cache dependency, needed for Dragonfly
Dragonfly::Middleware is already loaded

Dragonfly::Middleware is already loaded in 'dragonfly/rails/images'
Merge pull request #7 from gariggio/master

Dragonfly::Middleware is already loaded
Add local locale
Add support preview before update
Fix: style
Remove version dependency for using on v1 (still useful on 0.9.15)