[Client] Version check

[Patrix]

Just one quick note, you don't have to copy a this reference pointer to push it into array.

Code:

local thiz = this;
versions.append(thiz);

You can always write code this way:

Code:

versions.append(this)

Also the script itself is good, but propably the better idea would be kicking the player from the server with the specified reason.
I know, that this script is more like an example for newbies, but it's worth to mention how this should be done .
Anyway, good work.