Integration of the MtGox payment method and of the Bitcoin currency.

1. Copy the app and lib folders into your magento root folder.
2. Clear every cache under System / Cache Management
3. Log out from the admin panel and then log in again
4. Configure the MtGox payment method in System / Configuration, Sales > Payment Methods > MtGox Bitcoin, fill in the API Secret + Key

1. Go to System / Configuration, Catalog > MtGox Bitcoin, and set "Show price in BTC" as "Yes".
2. Clear your cache

1. Go to System / Configuration, Advanced > System. In Currency, select the Bitcoin currency.
2. Then configure on your website under System / Configuration, General > Currency Setup the Base Currency and Default Display Currency as Bitcoin, add as well Bitcoin in the allowed currencies.

1. When saving my API Secret + Key, I get an error message which says that the values are invalid. Ignore it and save again.
2. You override the native XML files in lib. We don't have a choice, until Magento adds natively the Bitcoin currency.
3. I don't see the Bitcoin currency in my country/language. We have to add it manually, create an issue.