Add MIT license info to gemspec [ci skip]
Add MIT license info to gemspec [ci skip]

1000ideas/paperclip-storage-ftp,mlankenau/paperclip-storage-ftp,mlankenau/paperclip-storage-ftp,xing/paperclip-storage-ftp,xing/paperclip-storage-ftp,toao/paperclip-storage-ftp,toao/paperclip-storage-ftp