use Seq instead of Array in getAlternatives
Merge branch 'master' of https://github.com/toburger/BankOCRKata.git
Rewritten bestMatch to nearestMatch which includes only the digits that are NOT equal to a valid digit (has at least one difference) and that does not have more than one difference in the characters.
do not normalize a already succeeding or erroing account number
use xunits theory data implementation for the tests