Fixed GtkLabel documentation on links

An escaped '&lt;' wasn't complete, the 'lt' part was missing.
Merge branch 'gtk-2-24' of git://git.gnome.org/gtk+ into gtk-2-24
filechooser: Document the settings keys

This is so people can modify gnome-tweak-tool or whatever without directly diving into
the source.
GtkFileChooser: fix documentation

https://bugzilla.gnome.org/show_bug.cgi?id=722496
docs: Fix gdk_pixmap_new arguments in tutorial

https://bugzilla.gnome.org/show_bug.cgi?id=708119
Update docs for GtkEntry::activate

Remove the 'you shall not connect' message from this signal.
While it is a keybinding signal, using it from applications is
fine and, in fact, expected.
Merge branch 'gtk-2-24' of git://git.gnome.org/gtk+ into gtk-2-24