validation: Validation with non-regular expression patterns

This class is meant to validate text strings using patterns that are defined with a simple syntax that is not based on regular expressions.

Here are a few examples of validation patterns:

"2N 5L" = 2Numbers 1Whitespace 5Letters e.g.: "12 ABCDE"
"2-5N 5L" = 2-5Numbers 1Whitespace 5Letters e.g.: "1234 ABCDE"

"2N:2N:2N" would match on "12:35:24" for checking time
"2N.2N.4N" would match on "01.01.2004" for checking date

This package includes sub-classes to do more specific validations like verifying address data patterns.