beginning of thumbnail implementation

Carrierwave isn't behaving w.r.t. serving the image url, even though things are uploading properly to public/uploads/etc.

I was planning to upload everything to S3 anyways, or within MongoDB using its gridfs, since I'm all on heroku anyways
save full body text for document searching; fix search typo, jeez
initial commit of trial of dragonfly for thumbnails
prelimary model changes and UI for thumbnails
ui changes and bug fix
save to s3 instead of local data store
this works right now???
working?
Merge branch 's3-saving'

Adds option to save thumbnails to S3 as well as adds caching for thumbnails
Merge branch 'origin/dragonfly'
updated readme for thumbnail saving