Add keybindings for eeiam volume control

dotfiles/i3/config

 bindsym $mod+Shift+m        exec "eeini -s dmenu.item | eedmenu --split = | eeexec"
 bindsym $mod+p              exec "dmenu_path | eedmenu | eeexec"
 
+bindsym XF86AudioRaiseVolume exec "eeiam deaf"
+bindsym XF86AudioLowerVolume exec "eeiam deafnomore"
+bindsym XF86AudioMute        exec "eeiam listening"
+
 exec "owncloud"
 exec "psi"
 exec "orage"