Use absolute imports on all plugins

This is necessary because Gajim is with 0.16.11 a python package

latex/latex.py

@@ -32,10 +32,10 @@ from tempfile import mkstemp, mkdtemp
 import random
 from subprocess import Popen, PIPE
 
-from common import gajim
-from plugins import GajimPlugin
-from plugins.helpers import log, log_calls
-from plugins.gui import GajimPluginConfigDialog
+from gajim.common import app
+from gajim.plugins import GajimPlugin
+from gajim.plugins.helpers import log, log_calls
+from gajim.plugins.gui import GajimPluginConfigDialog
 
 Gdk.threads_init()
 
@@ -145,7 +145,7 @@ class LatexRenderer(Thread):
         def fg_str(fmt):
             try:
                 return [{'hex' : '+level-colors', 'tex' : '-fg'}[fmt],
-                    gajim.interface.get_fg_color(fmt)]
+                    app.interface.get_fg_color(fmt)]
             except KeyError:
                 # interface may not be available when we test latex at startup
                 return []

latex/manifest.ini

@@ -1,9 +1,9 @@
 [info]
 name: Latex
 short_name: latex
-version: 0.3.1
+version: 0.3.2
 description: render received latex code
 authors: Yves Fischer <yvesf@xapek.org>
  Yann Leboulanger <asterix@lagaule.org>
 homepage: http://trac-plugins.gajim.org/wiki/LatexPlugin
-min_gajim_version: 0.16.10
+min_gajim_version: 0.16.11