* docs/manual/C/Thunar.xml.in: Add "Frequently Asked Questions".
* thunar/thunar-location-buttons.c(thunar_location_buttons_clicked):
Make sure the new active button is visible on the location button bar.
* ThunarHelp.in, Makefile.am: Add ThunarHelp script, which is used to
display the Thunar user manual.
* thunar/thunar-dialogs.{c,h}, thunar/Makefile.am: Add new helper method
thunar_dialogs_show_help(), which is used to open the documentation
browser.
* thunar/thunar-window-ui.xml, thunar/thunar-window.c: Add "Contents"
item to the "Help" menu.
* thunar/thunar-chooser-button.c(thunar_chooser_button_file_changed):
Fix typo.
* po/Thunar.pot, po/*.po: Merge new strings.
* po/de.po: Updated the german translations.