Use nick lists for grouping here/away
Use nick lists for grouping here/away

Instead of using + to denote users present, use nick groups and label
them Present and Away.  Also, add all non-deleted users to the server
buffer.

I believe this should fix #72

wee-slack/wee-slack,megalithic/wee-slack,trygveaa/wee-slack,scharfie/wee-slack,rawdigits/wee-slack