Add patch to compile with poppler 0.24, fixes bgo#705724

Signed-off-by: Uwe Scholz <uwescholz@src.gnome.org>
Fixed name lookup in template in src/gnome-cmd-collection.h
Updated German translation
Made source code compatible to libgsf >= 1.14.28
Added a section concerning shortcuts in the TODO file
Fixed some information in the shortcut documentation file
Made shortcuts visible also for toggleable menu items

For this, MENU_TYPE_TOGGLEITEM in src/gnome-cmd-main-menu.cc had to be extended.