Merge pull request #10 from mintalicious/master

Fixed required rules

bump version in README.md

Merge pull request #7 from mintalicious/master

Added german language + new contains rule

Fixes bug in uuid function that would throw an exception if a non-str…

…ing was provided

Adds is_countable polyfill and adds extra PHP test versions

Adds is_countable checks to values before counting

Fixes bug where recursive validate calls would clear the prefix

Validator prefix can be extended recursively

Added required-without rule

Added required-with-all and required-with-any rules