added gallery scaffolding, tests, and fixed up archives view test
basic gallery tests pass
made gallery items posts with a 'kind' == photo. this should help keep things DRY
gallery cover photos work
galleries front page looks alright
fixed gallery tests
view tests are pending
added ability to add photos to a gallery
got galleries controller test passing
cleaned up photo gallery display, changed dropzone to select and queue file
added photos.css to application.css
fixed up tests
added change photo gallery cover functionality
updated gallery cover logic
fixed public photo issues, updated edit photo functionality
added ability to move photos from gallery to gallery
added image-picker javascript
fixed attachment controller tests
fixed cascading deletes for gallery images
fixed form on new so that it detects if there is an id or not.  this
fixes #72