iZettle/izettle-toolbox — pull request #75 by adamvoncorswant (2014-07-09 00:14:16+00:00)
Title: Cart naming improvements

* `total` is removed as this is given implicitly anyway for all direct properties on the cart itself.
* `amount` is removed and to some extent replaced by `value` where appropriate.
* `effective` is replaced by `actual` as it's deemed clearer according to PR feedback

So, running the same example as in the discoussion in PR #74 and printing the cart.toString() value gives:
```
Cart {
LineItems:
LineItem { item = TestItem{ unitPrice = 9000, vatPercentage = 25.0, quantity = 1.0, name = Car}, grossValue = 9000, grossVat = 1800, actualValue = 8100, actualVat = 1620}
LineItem { item = TestItem{ unitPrice = 1000, vatPercentage = 12.0, quantity = 1.0, name = Apple}, grossValue = 1000, grossVat = 107, actualValue = 900, actualVat = 96}
Discounts:
DiscountLine { discount = TestDiscount{ amount = null, percentage = 10.0, quantity = 1}, actualPercentage = 10.0, value = 1000}
Gross Amounts:
Gross Value: 10000
Gross VAT: 1907
Actual Amounts:
Value: 9000
Discount Value: 1000
Discount Percentage: 10.0
VAT: 1716
}
```
ping @MrShish or @xiaodong-izettle again, and @idlefingers for inclusion. Sorry to bother you again:)