Modifications for sprint and moretrees

- Moretrees' leaves aren't walkable anymore
- Adding the snore sound in default
- Adding snore sound's play when stamina has run out (on both e and w
  sprint)
- I don't know why mud mods/snow/config.txt has been modified

mods/snow/config.txt

@@ -15,4 +15,4 @@ legacy = false
 # Enables debug output.
 debug = false
 # Enables falling snow.
-enable_snowfall = true
+enable_snowfall = true