Separate tax rate amounts from tax rates.
Update rounding mode.
Complete the model, add initial tests.
Fix TaxRate::getAmount(), add test coverage.
Add the TaxType repository.
Add initial tax types and zones.
Updating the Swiss VAT zone to include Büsingen and Lake Lugano.
Adding description to German VAT zone
Adding Description to Austrian Tax Zone.
Merge pull request #2 from dwkitchen/zone_review

Zone review
More definition tweaks.
All EU tax zone definitions
Iceland VAT Zone
Norway VAT zone
South Africa VAT zone
Swiss VAT Zone
Adding all the French DOMs
Error in country code.
Transliterating File names
Removing French Guiana as VAT does not currently apply here.