item_entity.lua replacement

edited by TenPlus1

Features:

• Items are destroyed by lava
• Items are pushed along by flowing water (thanks to QwertyMine3)
• Items are removed after 900 seconds or the time that is specified by remove_items in minetest.conf (-1 disables it)
• Particle effects added
• Dropped items keep sliding when on ice
• Items stuck inside solid nodes move to nearest empty space

License: MIT