Merge pull request #1 from petemmitchell/create_demo

Create demo
Merge branch 'master' of https://github.com/petemmitchell/paperclip_4_2_demo
Merge branch 'master' of https://github.com/uploaders/paperclip_rails_4.2_demo
Deleted readme files. Deirdre will be uploading new one.
Added screenshots to readme.
Merge pull request #2 from uploaders/create_demo

Adding screenshots to demo.