`ensure in loop': undefined method `path' for nil:NilClass (NoMethodError)
Adds Devise configuration

onfork: removes any constants defined as part of config/routes
`devise_for` method
worker: insert reloaded class into mapping's @klass variable
Merge remote-tracking branch 'rahearn/devise' into patch
document & auto-detect devise configuration helper
gemspec: upgrade to listen 0.7.0 to fix issue #43
Version 19.2.0 (2012-12-30)