data: Make the GstLaunch pipelines in rygel.conf work with gst-1.0

https://bugzilla.gnome.org/show_bug.cgi?id=724215
Assamese translation updated
Updated Ukrainian translation
Add support for pretty hostnames

Read and parse /etc/machine-info to obtain a pretty human readable
hostname (eg. "Bob's Laptop" instead of "bob-laptop"). If the
file is not found, or it can't be parsed, we fall back on the
normal hostname.

In GNOME, the pretty hostname can be configured in the control
center details and sharing panels. In other systems, it can be
changed using "hostnamectl --pretty".

https://bugzilla.gnome.org/show_bug.cgi?id=724138
Updated Norwegian bokmål translation
media-export: Clarify message

Signed-off-by: Jens Georg <mail@jensge.org>
renderer-gst: Return null in error case

This is slightly bad since this is a constructor; we can safely return here
because the C code has not executed the constructor yet.

As the function was deprecated anyway with an earlier commit, beaty doesn't
really matter.

Signed-off-by: Jens Georg <mail@jensge.org>

https://bugzilla.gnome.org/show_bug.cgi?id=722021
renderer-gst: Use contract programming

Improve previous commit to be more valaish.

Signed-off-by: Jens Georg <mail@jensge.org>
Updated Spanish translation
Updated Czech translation
Updated Brazilian Portuguese translation
Updated Lithuanian translation
[l10n] Updated Italian translation.
Updated Hungarian translation
Updated Slovenian translation
build: Support building with tracker-1.0

https://bugzilla.gnome.org/show_bug.cgi?id=724820
Updated Galician translations
Updated Galician translations
Updated Norwegian bokmål translation
Updated Korean translation