Use absolute imports on all plugins

This is necessary because Gajim is with 0.16.11 a python package

gui_for_me/gui_for_me.py

@@ -3,9 +3,9 @@
 from gi.repository import Gtk
 from gi.repository import GdkPixbuf
 
-from common import gajim
-from plugins import GajimPlugin
-from plugins.helpers import log_calls
+from gajim.common import app
+from gajim.plugins import GajimPlugin
+from gajim.plugins.helpers import log_calls
 
 
 class GuiForMe(GajimPlugin):
@@ -43,7 +43,7 @@ class GuiForMe(GajimPlugin):
             if base.chat_control != chat_control:
                 continue
             base.button.set_sensitive(chat_control.contact.show != 'offline' \
-            and gajim.connections[chat_control.account].connected > 0)
+            and app.connections[chat_control.account].connected > 0)
 
 
 class Base(object):

gui_for_me/manifest.ini

@@ -1,10 +1,10 @@
 [info]
 name: GUI For Me
 short_name: gui_for_me
-version: 0.2
+version: 0.3
 description: Gui for the '/me' command.
 authors: BomberMan
  copper
  Denis Fomin <fominde@gmail.com>
 homepage: http://trac-plugins.gajim.org/wiki/GUIForMePlugin
-min_gajim_version: 0.16.10
+min_gajim_version: 0.16.11