Add inline editor for Invoice and Order.
Clear cart only when order created without payment required or payment executed.
Added Clicktale tracking code
Merge pull request #75 from gregwym/clear-cart

Clear cart only when order created without payment required or payment executed.
Merge pull request #74 from gregwym/admin

Add inline editor for Invoice and Order.
Merge pull request #76 from this-username-is-taken/clicktale

Added Clicktale tracking code