Replace Psi+ with tkabber

* buggy (segfaults on some occasions)
* UI is not intuitive enough (too many clicks for some simple actions);
  Looks like the same happens to tkabber and actually most Jabber
  clients
* unreasonable CPU consumption

.i3/config

@@ -123,6 +123,7 @@ assign [class="Navigator"]  "2: browser"
 assign [class="Chromium"]   "2: browser"
 assign [class="Skype"]      "3: im"
 assign [title="Psi+"]       "3: im"
+assign [class="Tkabber"]    "3: im"
 assign [class="Remmina"]    "4: vbox"
 assign [class="Clementine"] "5: media"
 

.xinitrc

@@ -36,7 +36,7 @@ fi
 		-corners 0+-0 -cornerdelay 5 -cornerredelay 900000 &
 	redshift-gtk &
 	skype &
-	psi-plus &
+	tkabber &
 	nm-applet &
 	pa-applet &
 	clipit &