The difference with rubycas-client is not mentioned in the README

[stgm]

I still have no idea what the real difference is, but I'm almost certain this gem is simply a relic from times past.

However, I had still been using it because I simply had no idea I could be using rubycas-client just as well. I migrated my Rails app in a minute or 2.

It would be very helpful if you simply mention at the top of the README what this gem is still good for (old versions of Rails maybe?).