Paperclip v4

Current functionality:
- can upload an image to resources from edit page
- can upload an image to resources form add resource page
- can change image
- image only shows up if it exists

Future functionality:
- can remove image
- move image functionality to separate field and use attachment for documents (pdfs, word, etc)
- can upload documents
- can remove documents
- maybe use jquery uploads capability
- can upload multiple documents or images
- integrate with evernote