Re-coded HUD's legacy into hudbars

- Solves part of #94

mods/hudbars/depends.txt

@@ -0,0 +1 @@
+default

mods/hudbars/hud_legacy.lua

@@ -0,0 +1,9 @@
+-- Miscellaneous legacies from our old mod, HUD by BlockMen
+--
+
+minetest.register_on_joinplayer(function(player)
+    player:hud_set_flags({crosshair = true, hotbar = true, healthbar = false, wielditem = true, breathbar = false})
+
+    player:hud_set_hotbar_image("hudbars_hotbar.png")
+    player:hud_set_hotbar_selected_image("hudbars_hotbar_selected.png")
+end)

mods/hudbars/init.lua

@@ -357,3 +357,6 @@ minetest.register_globalstep(function(dtime)
 	end
 	if timer > 4 then timer = 0 end
 end)
+
+-- Our legacy
+dofile(minetest.get_modpath("hudbars").."/hud_legacy.lua")