Improved def robustness

[Goosius1]

• Made configs more robust again
• Def files now look like this:

  region_name : Earth
  top_left_corner_location: -2434,-2049
  bottom_right_corner_location: 4064,2056
  average_province_size: 50000
  brush_square_radius_as_percentage_of_province_square_radius: 60
  brush_max_move_as_percentage_of_brush_square_radius: 50
  brush_min_move_as_percentage_of_brush_max_move: 50
  max_brush_moves: 100
  new_town_cost: 250
  upkeep_town_cost: 10