postreg app

register and pick media

Get it up and running

Run bower update in the assets directory.
Put in A8 site origin and other app settings in appsettings.json:
To run the app from the terminal, type in the path to the nwjs executable and then the path to the nwviz app:
```
/Applications/nwjs.app/Contents/MacOS/nwjs /path/to/nwviz
```