No, that's not what "veni vici sine videri" means. It isn't actually proper latin, but I'm pretty sure he wanted it to say: "I came, I conquered, I was not seen." We have no evidence that he is AGS or JK. The github account lists his name as James Zhang, which is also the name he gives in his copyrights. He seems to have taken AP comp sci in 2010, so I would estimate that he is in his early twenties. (This, by the way, is why you try to put as little information as possible online). It would be nice if you used the '.' character to separate sentences. Also, please think more and talk less, it's a good rule for life.
Also, Tmservo, please use a consistent capitalization style. I would understand if you were using a small keyboard and you found it easier to leave some words lowercase, but your sentences tend to have many unnecessarily capitalized words as well. Here is a guide which should help clarify when you should capitalize words.