move images out of db into storage

[mrigdon-zz]

• [x] upgrade to newest fb sdk
• [x] add images to storage
• [x] create new db table for workouts with no images (workouts_new)
• [x] implement new code
• [x] add ui image loading placeholder
  • [x] add to featured
  • [x] add to workouts

[mrigdon-zz]

New Workout and Featured Fetch Algorithm:

1. Fetch data from db
2. Receive data and begin fetch for image
3. Add data to UI with placeholder image
4. Receive image and replace placeholder
5. Cache image

[mrigdon-zz]

technically finished - opening a new issue for videos however