v1.0.0-beta5

Add BooleanOrNull validation

Prefer using rawurldecode() instead of urldecode()

Otherwise + will disappear especially in RFC3339 date time
`rawurldecode() does not decode plus symbols ('+') into spaces. urldecode() does.`
See http://php.net/manual/en/function.rawurldecode.php

Urldecode any POST/PUT string received

v1.0.0-beta3

Add PHPStorm folder in .gitignore

Add nullable check on DateTime

Fix Sensio Security Checker

Otherwise An error occurred: gnutls_handshake() failed: A TLS fatal alert has been received...
See https://github.com/sensiolabs/security-checker/pull/77

v1.0.0-beta

Update README.md stating dependency free

Pre release

v0.9.0

Add Validator mustBeStringNotEmpty()