Nations and borders

[angusthompson]

Nations must be added after permanent settlements have formed.

• They must be a property of each cell.
• They must be translucently visible.
• Properties can be added later.

[angusthompson]

• The border overlay and basic settings have been added, and hide/show button.
• At the moment all borders are the same colour, have no gameplay impact and cover any tile within 2 of a city.

[angusthompson]

Towns and borders have been reworked for future expandability.

• Towns and states have been separately added.
• Towns generate borders which are attributed to states.
• Each state has a name and a fixed border colour.
• New towns will either be incorporated into an existing state, or found a new one.
• Borders are prioritised by age for now: Older borders will not be affected by new towns.