Multiple maps

[danielbrownmsm]

It'd be cool to swap between last year's map and the old scrabby map just to see how the code handles different situations. A randomly generated/seeded map would be cool too, or some kind of map builder.

These are all kind of their own big issues/tasks in their own right so this is more of a tracking issue than a one-off thing, so see child issues for details.

• import/copy old scrabby map
• add a way to swap between maps on the main menu
• add a configurable map that has randomly generated aspects
• add a 'buildable' map where you can select which sections in what order you want
• add a way to configure the ramp being there or not (and/or being flat or not)
• as an alternative to a buildable map, make variations of this years map, but have like an "all-chicane" map and an "no-barrels" map just to test the code in different scenarios