Add api documentation (#361)

you

2017-06-05 987cc5a6a425b1f9bcd9000608dc389a45c675a1

 technic/machines/supply_converter.lua

@@ -11,6 +11,8 @@

local S = technic.getter

local cable_entry = "^technic_cable_connection_overlay.png"

local function set_supply_converter_formspec(meta)
   local formspec = "size[5,2.25]"..
      "field[0.3,0.5;2,1;power;"..S("Input Power")..";"..meta:get_int("power").."]"
@@ -158,9 +160,14 @@

minetest.register_node("technic:supply_converter", {
   description = S("Supply Converter"),
   tiles  = {"technic_supply_converter_top.png", "technic_supply_converter_bottom.png",
             "technic_supply_converter_side.png", "technic_supply_converter_side.png",
             "technic_supply_converter_side.png", "technic_supply_converter_side.png"},
   tiles  = {
      "technic_supply_converter_tb.png"..cable_entry,
      "technic_supply_converter_tb.png"..cable_entry,
      "technic_supply_converter_side.png",
      "technic_supply_converter_side.png",
      "technic_supply_converter_side.png",
      "technic_supply_converter_side.png"
      },
   groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2,
      technic_machine=1, technic_all_tiers=1},
   connect_sides = {"top", "bottom"},