Nice that it worked out for you
The admin folder contains the code (embryo status) for managing the addon in the ..... roster addon config section.
Have a look at the Keys_BC addon (soon to be abandoned), you'll find the same folder. The admin section in the roster shows says you what is does (will do).
I’m pretty sure that Pleegwat already mentioned this in a recent post.
What your are doing right now is looking at the "bleeding edge code corner" of WoWRoster.net
Code pops up, is pasted away, and changes all the time.
Taking code from there for your live roster site could be helpfull, but also dangerous.
"Be careful out there"