[antum] Add function 'antum.getItem':

Retrieves an item from registered items using name string.

antum/api.lua

@@ -174,6 +174,23 @@ function antum.dependsSatisfied(depends)
 end
 
 
+--[[
+  Retrieves an item from registered items using name string.
+  
+  @param item_name
+    Item name string to search for
+  @return
+    Item object with name matching 'item_name' parameter
+]]
+function antum.getItem(item_name)
+	for index in pairs(minetest.registered_items) do
+		if minetest.registered_items[index].name == item_name then
+			return minetest.registered_items[index]
+		end
+	end
+end
+
+
 --[[
   Retrieves a list of items containing a string.