extract file extension from content-type when extension is missing
extension should return nil if file has no extension
Update fog.rb

Documentation comment update
Add European Portuguese Translation
Merge pull request #1273 from pedrosmmoreira/pm-add_european_portuguese_translation

Add European Portuguese Translation
Add support for custom Paperclip mappings

Paperclip supports custom interpolations in images' paths. In order to
ease transition into CarrierWave, support the same functionality with the
`Paperclip::Compatibility` module.

The public api is similar to Paperclip's

```ruby
class CustomUploader < CarrierWave::Uploader::Base
  include CarrierWave::Compatibility::Paperclip

  interpolate :some_method do |custom, style|
    custom.model.some_method
  end
end
```

This is accomplished by appending the desired functionality into
`CarrierWave::Compatibility::Paperclip#mappings`
Merge pull request #1271 from acumenbrands/support_for_custom_paperclip_interoplations

Add support for custom Paperclip mappings
Specs for file with no extension
Add Turkish translations for error messages.
Merge pull request #1278 from brozturk/master

Add Turkish translations for error messages.
Arel 5 from rails/arel
Improve README on recreate_versions! throwing an exception
Merge pull request #1279 from rin/master

Improve README on recreate_versions! throwing an exception
Update fr.yml

Reworded a few translations.
Merge pull request #1280 from laurentqro/master

Update fr.yml
make generator namespace aware
Merge pull request #1283 from akhilstanislavose/namespace-fix

Make generator namespace aware
changed :scale to :resize_to_fit in generator
Merge pull request #1291 from zealot128/patch-1

changed :scale to :resize_to_fit in generator
Add Ruby 2.1.0 to .travis.yml