Create a new demo map

[wquintal]

I have purchase an nice asset pack that can be used to generate a new prettier map.

Map

1. At least 10 different room
2. Each room of a fixed size with maybe door at center location for easier generation

Application

1. Add a map picker in the app , if no explict map is provided.
2. Add a settings in the website for the default map to choose to will be pass down to the app