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
Organize builtin into subdirectories
Rename "minetest" and "engine" tables to "core"
Update to Lua 5.2