Rounding (away from zero). Configurable (solution attached)

[mariannk]

Seems like currently the tax calculation of NC doesn't include rounding based on the sub-total. Here is an example:

If the Sales Order Sub-total is: $100.05
Tax percentage is: 10%

The calculation result from current NC is: $10.00, while if we consider the the most frequently used rounding (rounding to 1 when great than 0.5), it should be $10.01

Solution: http://www.nopcommerce.com/boards/t/35157/suggestion-rounding-of-tax.aspx

See related work item - #1424

Contribution: #1983

[AndreiMaz]

done