polishes to d?afk (-> d?away)
polishes to d?afk (-> d?away)

* rename d?afk to d?away
* automatically return from away status upon sending a message
  * will not occur if you went away less than 5 seconds ago
* simplify away notices

slice/dogbot,sliceofcode/dogbot,sliceofcode/dogbot,slice/dogbot,slice/dogbot