Fix 'association names must be a Symbol' exception in Rails 4
Fix for Rails 4 deprecation warnings about find_or_create_by_style
Going for rails4
More Rails 4 preparation
initial working Rails 4 version
Rails 4 is supported from paperclip version 3.4 and upwards.
Merge remote-tracking branches 'pjungwir/fix-for-rails-4' and 'pjungwir/fix-for-rails-4-deprecation-warnings'
Preparing for version 2.0