fix save of stats (format = 2)
setup AreaDef, prepare to load area from svg (created under inkscape) part 1
setup AreaDef, load json into AreaDef part 2
fix comments
setup AreaDef, add svg support + load json or svg via asset_pack importers
setup AreaDef, allow to read path (with stroke) as static_walls
control debug of collision's checker