I checked the webpage and i must say that i am totally confused. First, it says buttplug is a library. Then, in architecture overview there are 'protocol' and '

I checked the webpage and i must say that i am totally confused. First, it says buttplug is a library. Then, in architecture overview there are 'protocol' and 'client/server', which does not make sense for a library. So it is not a library, but a deamon handling these devices? Wh then call it library? If it is a deamon, is there any user configuration? Am i only one who is totally confused? Perhaps some picture with components and relations between them would be helpful?