cleanup hooks
rename sunrize_uploader method to ab_admin_uploader
Rewrite carrierwave filename bulding
1) move version name to the end
2) allow custom filename throught model `build_file_name` method
3) use secure token in the filename for non cropped image
4) transliterate original filename (can be disabled via `transliterate` config in uploader)
specs and factories for carrierwave uploader