libview: Allow printing to all formats supported by backend

Set output format of EvPrintOperationExport according to the format
requested by user or by capabilities of used backend if there
is only 1 choice.

https://bugzilla.gnome.org/show_bug.cgi?id=724044
libview: Show correct warning when printing

Show that requested format is not supported by printer
if it is not supported.

https://bugzilla.gnome.org/show_bug.cgi?id=724044
Updated Hungarian translation
Fix a crash during the build with introspection enabled

Using GI_SCANNER_DEBUG=save-temps, the temporal files remained.
It has been suggested that calling gtk_style_context_add_provider_for_screen()
should, inside a g_once_init(), be in the class's _init() (not class_init()) hook.

https://bugzilla.gnome.org/show_bug.cgi?id=726812
ev-window: Fix enable caret navigation question message

https://bugzilla.gnome.org/show_bug.cgi?id=727062
thumbnails: Remove extra call to ev_document_get_page_size
doap: update URLs
Mark images as not translatable to keep them off translators radar
l10n: Update Japanese translation
l10n: Update Japanese translation

Fix typo
ev-window: Don't crash when trying to save a copy

We can not free both folder_uri and parent_uri. If parent_uri is
non-NULL then it will point to the same location as folder_uri.
Also, parent_uri is now unused so we can just remove it.

Fallout from 41ce0e16cc3f395766abb239f990dd98c3144001

https://bugzilla.gnome.org/show_bug.cgi?id=727536
Show fullscreen toolbar only when moving the mouse to the top of the screen

When in fullscreen, the toolbar is hidden on the
top of the screen. Moving the mouse there makes
the toolbar appears and removing it makes it
disappear again.

https://bugzilla.gnome.org/show_bug.cgi?id=696643
Show the fullscreen toolbar when the gear menu is shown using F10
Updated Arabic translation
a11y: new EvPageAccessible

Basic skeleton for a new accessible class, that represents
each individual page.

https://bugzilla.gnome.org/show_bug.cgi?id=724965
a11y: expose EvPageAccessible as children of EvViewAccessible

https://bugzilla.gnome.org/show_bug.cgi?id=724965
a11y: move AtkText implementation from EvViewAccessible to EvPageAccessible

https://bugzilla.gnome.org/show_bug.cgi?id=724965
a11y: move AtkHyperText implementation from EvViewAccessible to EvPageAccessible

https://bugzilla.gnome.org/show_bug.cgi?id=724965
a11y: add if applies ATK_RELATION_FLOWS_TO/FROM on EvPageAccessible

https://bugzilla.gnome.org/show_bug.cgi?id=724965
a11y: managing atk states on EvPageAccessible

This includes:
 * Implements ref_state_set on EvPageAccessible
 * Notify FOCUSED state changes

https://bugzilla.gnome.org/show_bug.cgi?id=724965