Login works with effects now, more like ngrx example app

Fixes #12 (closed)

This is a pretty major change. It makes the app resemble ngrx example app much more. It also moves more state to store and lets you see more of what's going on in devtools. @BrendanBerkley take a look and make sure it makes sense to you. I'm working on the mobile app at the same time. My plan is to merge in an overhaul for each page as I implement them in the app.

This MR can get merged once login is 100% finished and tests pass.