Add github ribbon
Refine instructions
Merge branch 'master' of github.com:raboof/learnyouacity
Refactor to make public API clearer
Add maps function to get the bounds of the currently shown map
Simplify starting the game

No more shift-click-drag to select the playing field, for now just zoom to the
desired city and hit 'start'
More clear and attractive presentation/texts
Remove navigation/zoom controls after selecting the playing ground
Set a minimum zoom level before starting the game
remove console.log statements