Feature/validate token (#2)

* base of validation with TDD

* temp commit

* add some testings

* add missing validator files

* improve code by TDD

* use globals

* add uri testings

* add uri testings

* test claims

* quick improve and fix cryptrClaimsValidatorTest

* add happy way tests for claims validator

* add failing tests

* try add coverage report/support

* improve code and testing with env vars

* add base of README file

* add homage to composer.json