Decoration: Stop DecoSimple::resolveNodeNames from complaining about no node name if decolist is used

Fix warning message for spawnby nodes

Prevent type-punning warning caused by casting enum to int

old_craft_grid, craft_inv) and
minetest.register_craft_predict(itemstack, player, old_craft_grid,
craft_inv)

Conflicts:
	src/script/lua_api/l_object.cpp

Add minetest.get_gametime() API function, that returns the number of seconds since the world was created.

Add engine.gettext() and remove gettext() calls in guiFormspecMenu.cpp