BuyItems

Function:

 * boolean buyItems(item, count)

Parameters:

 * item - can be item id/name
 * count - must be a number. Count of items bot should buy.

Return value:

 * This function return an boolean indicating if items were succesfuly bought. Returns true if success, false if failure.

Description:

 * This is the main function avaiable to buy items from NPC trade window. It automatically finds the item on the list and buys given ammount of it from a NPC.