Fix heart + bubble bar size on different texture packs
Add DPI support for statbar
Move heart+bubble bar to Lua HUD
Add statbar size (based upon an idea by blue42u)
Add support for customizing breath and statbar
Add a limit to node meta data resolving recursion
Add write_json() to the async API
Merge remote-tracking branch 'minetest/master'

Conflicts:
	doc/lua_api.txt