Added updateOption method

Set an option on a validator and update the status
Merge pull request #447 from AlaskanShade/master

Zip code and isExcluded updates
#269, #273, #447: Skip the _isExcluded() when initializing the form, thanks to @AlaskanShade
#447: zipCode validator allows to set the country code via another field or callback, thanks to @AlaskanShade
Merge pull request #448 from AlaskanShade/UpdateOption

Add updateOption() method
#416, #448: Add updateOption() method for updating the particular validator option, thanks to @AlaskanShade
#232, #426: Add test suite for the id validator
#179, #426: Add test suite for the vat validator
#426: Add test suite for the zipCode validator
#452: Update zipCode document typo, thanks to @mike1e
Merge remote-tracking branch 'upstream/master'