* fix related to compatibilit with minetest 0.4.17 and 5.0.0/5.2.0 for player object bug
* https://github.com/minetest/minetest#8452 reported but never solved property
>Made wasps nest flammable and changed description from "Hive" to "Nest"
>Dragons now slow down in water, they will not be able to leave
>Fixed dragons attacking mobs whilst flying
>Improved dragon attacks - they are slower and the ice dragon can freeze
water
>all dragons now drop gems
>Increased spawn rate of boss dragons
>Improved ice texture