telepathy-account-widgets: Update submodule

Gets us a few bug fixes and removal of deprecated code.
telepathy: Adjust the UI so that we can use a header bar in the dialog

Use the latest telepathy-account-widgets for header bar support and
stop using the action area.

Fixes: https://bugzilla.gnome.org/729638
build: Remove unused variable

Fixes: https://bugzilla.gnome.org/729173
Introduce org.gnome.OnlineAccounts.MediaServer

This is meant to represent media servers. eg., digital media servers
using DLNA. We might consider Airplay in the future.

https://bugzilla.gnome.org/show_bug.cgi?id=730890
Generate stubs for the dleyna-server D-Bus API

These will be useful for adding a GoaMediaServerProvider.

https://bugzilla.gnome.org/show_bug.cgi?id=730890
Post-release version bump
Add a whitelist for providers

The whitelist is a GSetting where you can either list the names of the
providers that should be enabled or use 'all' to have everything.

Bump minimum intltool version to 0.50.1 for GSettings XML support.

Modelled off gnome-settings-daemon whitelist.

Fixes: https://bugzilla.gnome.org/729173
Updated Turkish translation
Updated Swedish translation
daemon: Don't try to remove non-existent GSource

The GSource would have already been removed when we quit the GMainLoop.

Fixes: https://bugzilla.gnome.org/731531
alarm: Don't translate private classes

GoaAlarm is a private class. The strings used to describe its
properties are not going to show up in any public documentation, so
there is no need to translate them.

Fixes: https://bugzilla.gnome.org/707299
Use g_clear_object wherever applicable
webview: Ensure that mouse and keyboard events reach the inspector

The WebKit inspector needs to be put in its own window group because
the dialog that spawns it calls gtk_dialog_run afterwards.

Fixes: https://bugzilla.gnome.org/731614
Updated Slovenian translation
google: Add support for tasks

At the moment there is no separate switch for it because it is so
similar to calendars. We can consider adding a separate switch later
if there is need for it.

Access to the Google Tasks API was turned on in the Google APIs
console because the documentation suggests that it is the way to go.
However, some third-party websites [1] mention a scope string that can
be put in the sources. Given that Google's documentation has proven to
be unreliable in this regard we had added it too. For some context see:
2c93558da1e85bbf8c17715820344e7eb708f274 and
9182fb378614abb2ff0245fe71a753f22eaaa906

[1] https://discovery-check.appspot.com/

Fixes: https://bugzilla.gnome.org/693689
google: Update README

Sometimes the documentation does not mention the OAuth2 scopes that
need to be specified in the sources. Mention some of the third-party
sites that can be useful to overcome that.

Fixes: https://bugzilla.gnome.org/693689
Updated German translation
Updated Chinese (Taiwan) translation
Updated Hungarian translation
Add Media Server

https://bugzilla.gnome.org/show_bug.cgi?id=730890