Lights to place indoors (tallow candle, torch stand); docs brought up to date; the journey plan; sticky teleports in net tests; protocol 15

docs/PROGRESSION_DESIGN.md

@@ -1,6 +1,26 @@
 # Progression and challenges design
 
-Status: **P1-P5 built** (iron, stone, adversaries, hazards, the Old Stag).
+Status: **P1-P6 built** (iron, stone, adversaries, hazards, the Old Stag,
+and uses for every material).
+
+*As built in P6 (0.3.0, every material earns its place):*
+- Clay jar (8 clay, fired at a campfire): 6 slots, food inside ages at a
+  third of the rate (`Inventory.keep_mult`, which moves the "rot" stamps).
+- Bedroll (3 hide, 6 feathers, 4 fibre): a bed (group "bed", like the bed
+  everywhere a spawn bed is looked for) that needs no shelter, only no rain
+  or snow on it.
+- Wolf-pelt rug (3 wolf pelts): a rug, so Cozy like the fur rug.
+- Fang necklace (2 fangs, 1 alpha pelt): a "charm" carried anywhere in the
+  bag; hits whose cause names a wolf do 70% (`Actions.charm_mult`).
+- Bear cloak (2 bear hide, 2 hide): +40 warmth, the warmest.
+- Pemmican (2 cooked meat, 3 berries, 1 bear fat at a campfire, makes 3):
+  meat and greens, keeps 30 days.
+- Rotten food is fishing bait: carried, bite waits x0.6, a bite uses one.
+- Lights to place (after 0.3.0): tallow candle (bear fat and fibre, makes 4,
+  7 m) and torch stand (11 m, shadows), always lit (`lamp.gd`).
+- `Q` drops what you hold (shift: one), at your feet, online too; `K`/`M`
+  move the hotbar up and down the bag's five rows (any slot can be held).
+- `tests/test_items_more.gd` checks every material has a use.
 
 *As built in P1:*
 - Iron nuggets (70, in the scree under the rim), clay (60, on the lake