Merge pull request #2 from x3ro89/master

Uninstall routine for shop-connector setup
Added lanugage keys for shopping cart labels
Merge
Added user data page in checkout process.
Changed method "getShippingPayment"
Merge #2
Added shipping and payment type selection page for checkout process.
Added Labels for shipping and payment
Added plugin for compiling i18n files.
Merge pull request #4 from D4rk4ng3l/feature/checkout

merged pullrequest for checkout feature from D4rk4ng3l