started tile serializing

TODO

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+Assets and i18n:
+    - move tile settings to json, generate from there (part of prefabs)
+    - prepare all interface entries for i18n
+    - all texts (terrain, mobs, quests) also in at least 2 languages
+
+ECS & engine:
+    - implement time queue (how to deal with closures?)
+    - move all rendering to systems
+    - try to move input handling to systems
+
+Dungeon and branches:
+    General:
+    - river! (dig_bezier)
+    - erosion (?)
+    - global map of valley
+    Prefabs:
+    - load prefabs
+    - compose from gens and prefabs
+    - editor for prefabs
+
+Combat:
+    - generate skeleton / intesines / muscle / eyes&ears & fingers from templates
+        - serializable
+        - config in outer files
+    - mass
+    - damage from skill / mass / speed / material density
+    - no hitpoints! blood is the life source
+
+Items:
+    - pickup
+    - drop
+    - use
+
+Mobs:
+    basic:
+    - place mobs
+    - move mobs
+    advanced:
+    - ai
+    - dijkstra maps
+
+Quest engine:
+    - look at parsers like URQL etc
+    - distorted Aschenputtel story / partisans / rapist prince / Grey Mountains