File permissions

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>
Mention entities who are explicitly given permission

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>
Add inbox (file posts mentioning you)

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>
Feed redesign

- Use flex box layout instead of a table
- Add avatar (with name/entity on hover)
- Don't show file extention more than once
- Move some things around

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>