v0.3.0

Add following behaviors and validators:

isAfter,
isAlpha,
isAlphanumeric,
isAscii,
isBase32,
isBase64,
isBefore,
isBIC,
isBoolean,
isBtcAddress,
isByteLength,
isCreditCard,
isCurrency,
isDataURI,
isDate,
isDecimal,