(station) Make demo images with CZTR tiles (#98)

Also restores the "normal" demo to the version without the station square. That purpose is now served with its own section.

station/stations/dovemere_2018.py

@@ -137,6 +137,7 @@
             demos.special_demo_aq,
         ],
         "Station Square": [demos.west_plaza],
+        "With Other NewGRF": [demos.cztr_demo],
     },
     road_stops=roadstops,
 )

station/stations/dovemere_2018_lib/demos/__init__.py

@@ -16,3 +16,4 @@
 from .special_cp import special_demo_cp
 from .special_aq import special_demo_aq
 from .west_plaza import west_plaza
+from .cztr import cztr_demo

station/stations/dovemere_2018_lib/demos/cztr.py

@@ -0,0 +1,10 @@
+from station.lib import Demo
+from .normal import normal_demo
+from station.lib.utils import get_1cc_remap
+from agrf.graphics.palette import CompanyColour
+from agrf.lib.building.layout import DefaultGraphics
+
+for tile_id in [1011, 1012, 1313, 1314, 3981]:
+    DefaultGraphics.register_third_party_image(f"third_party/cztr/{tile_id}.png", "cztr", tile_id)
+
+cztr_demo = Demo(normal_demo.tiles, "with CZTR", remap=get_1cc_remap(CompanyColour.RED), climate="cztr")

station/stations/dovemere_2018_lib/demos/normal.py

@@ -5,12 +5,6 @@
 from station.stations.dovemere_2018_lib.roadstops import roadstops
 from station.stations.dovemere_2018_lib.objects import objects
 
-roadstops = [[roadstops[0].doc_layout.lower_tile()] * 5]
-west_square = [[objects[0].doc_layout.lower_tile()] * 5]
-
-
 normal_demo = Demo(
-    semitraversable.demo_1(5, 7) + roadstops + west_square,
-    "5×7 station layout (1 tile ≈ 40m)",
-    remap=get_1cc_remap(CompanyColour.WHITE),
+    semitraversable.demo_1(5, 7), "5×7 station layout (1 tile ≈ 40m)", remap=get_1cc_remap(CompanyColour.WHITE)
 )