Add German translations

I just took the spanish file edited it and remove the commented out parts.
Enable German translation
Merge pull request #113 from linuxrider/master

Add German translation
Change of german language code
Merge pull request #114 from linuxrider/master

Corrected german language code
Autotools improvements
Let control number of pomodoros to a long break
Notify start of pomodoro by disabling screensaver
Suppress warning about destroyed dbus proxy

It seems normal behavior when closing dbus connection.
Fix remidner notification
Disconnect settings 'changed' signal when destroying objects
Update Polish translation
Release version 0.9.1
Support for GNOME 3.10
Migrate to gstreamer-1.0
Update es.po

Improve translation and fix some typos.
Merge pull request #119 from Yajo/patch-1

Update Spanish translation
Fix gstreamer change in src/Makefile.am
Replace EggListStore with GtkListStore
Reorganize preferences dialog