Altcoin / cryptocoin currencey exchange

Here are example sites of what we are looking for [login to view URL] [login to view URL] [login to view URL] [login to view URL] We need a crypto currency trading site. There will be no need for fiat based currency pairs, the site will be purely crytpo based. There will be BTC, LTC and XPM accpeted as well as a selection of lesser known currencey pairs. There needs to be 2 factor authentication offered (using google authenticator). for login and cash out! The user needs to be able to add and withdraw various crypto currencies All withdrawals need to have a fee that can be changed. The abblity to add new currencies when needed. A usable backend where admin of the site is simple and powerful. The user is able to buy and sell crypto currencies. The user is able to post orders and cancel them if not fullfilled and no longer needed. The site must be very secure and ther must be facitity to log all use activity. You are free to use scrypts from sites that you may have already worded on. The site must be scaleable and able to add new currency pairs with ease! ALL CODE MUST BE FULLY NOTED AT EVERY STAGE! This will be a simple project for somone who has experience !!!!! YOU MUST HAVE EXPERIECNCE OF WORKING WITH CRYPTO CURRENCIES!