[WIP] Image space integration

Integrating image space:

- [X] get rid of old code in views
- [x] update db models (no project_id in images, links between images in image_space)
- [x] add image_space_name in routes
What is the new entry point to the image space app?  All the other routes require a image_id but a user won't have that if they come in through the project page.