V1.0 dev

## An 'MVP' of sorts...

### Current situation
- [X] Authentication #1 
- [ ] Design a better-than-caveman UI #10 
- [X] Create categories #3
- [X] Create dossiers #2 
- ~~Create basic hard-coded categories/subcats (Movies, Music)~~
- ~~Unit test all the things~~ (I have made a huge mistake x_x)