Proxy API

Not mergable quite yet

- [x] proxy every request through the client server
- [x] remove the route params when a user logs in
- [x] make sure redirects work for logging out and when logging in

## key routes to test
- [x] create cluster
- [x] subscribe / unsubscribe
- [x] add a new subreddit to a cluster
- [x] add an admin to a cluster
- [x] logout
- [x] view a cluster
- [ ] view a cluster and trigger infinite scroll