Encode and decode Adobe AMF3 protocol data for Cocos2dx

1. Undefined
2. Null
3. False
4. True
5. Integer
6. Double
7. String
8. Date (precented by CCDate)
9. Array (not supported mixed array)
10. Object (custom class must extern AmfCoding, not supported dynamic object and externalize)

1. Create a custom class that externs AmfCoding
2. implements the following methods: getClassName(), isEquals(cocos2d::CCObject *), initWithDecoder(CCDecoder *), encodeWithEncoder(CCEncoder *)

If you don't work out, please check TestObject and TestComplexObject in Classes directory.