carrierwaveuploader/carrierwave — pull request #1358 by abevoelker (2014-04-05 00:09:34+00:00)
Title: Fix default gravity in MiniMagick resize_and_pad helper

The default gravity option in the MiniMagick resize_and_pad helper is relying on an RMagick constant. This was causing an error in my uploader (`NameError: uninitialized constant Magick`) when I wasn't passing in a value for the gravity. Sample class that was giving me the issue:

```ruby
class ImageUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick

version :thumbnail do
resize_and_pad(160, 160)
end
end
```
This probably won't affect many people since the docs specify using `process` directly.