Fix #166 - Update Galician, German, and Spanish translations

Everything is updated for German translations except for this 3 new strings.

<string name="use_device_timezone">"Use device timezone"</string>
<string name="use_device_timezone_description">"Always use user's timzeone regardless remote server's local time"</string>
<string name="tripplanner_error_not_defined">Sorry, there was an error with servers reply</string>
<string name="refresh_server_list_error">Not possible to obtain servers</string>