Add amazon web services gem for image upload support
Configure dev/prod environments for was bucket

* Initialize paperclip settings
Add image type to model w/validations
Add image fields to loan_request table in db
Add file input field to loan_requests#new view
Add :image param to loan_requests controller
Upload loan request images via Paperclip
Default missing image
Add images to loan request views
Merge pull request #119 from bayendor/118_borrower_photos

118 borrower photos