Set ipython3 as "calculator" (XF86Calculator) hotkey

dotfiles/config/i3/config

 bindsym $mod+period         exec "htopnow"
 bindsym $mod+x              exec "mousepad"
 bindsym $mod+slash          exec "pavunow"
+bindsym XF86Calculator      exec "twinner ipython3"
 
 #------------------------------------------------------------------------#
 ## WWW magic mind readers                                               ##