adds user avatar uploading
adds avatar uploading and deletion for User profiles
shows carousel_item image on home page
fixes typo
adds project icon uploading and deletion
replaces lots and lots of placeholder images with actual icons & avatars
Remove useless specs
Don't auto-require RMagick, as it causes double-require warnings.
Carrierwave does content_type detection automatically now.
Schema
merges master
Merge pull request #25 from feastongood/image_uploading

Image uploading