v4l2src: Ensure internal pool activation

Before we would hit an assertion "'gst_buffer_pool_is_active (bpool)' failed"
if the internal pool was not used to push buffer downstrea, hence not
given to the baseclass.

https://bugzilla.gnome.org/show_bug.cgi?id=732912
wavenc: Return not-negotiated if we got no caps or caps negotiation failed

And do it always, not inside a g_return_val_if_fail().

See https://bugzilla.gnome.org/show_bug.cgi?id=732939
rtspsrc: fix query leak

https://bugzilla.gnome.org/show_bug.cgi?id=733003
examples: client-rtpaux: Release reference to parent when done

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=732976
tests: fix pipeline leak in videocrop test

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=732976
v4l2bufferpool: Workaround elements not requesting any buffers

This is a workaround for element that don't request buffers when
they should.

https://bugzilla.gnome.org/show_bug.cgi?id=732288
po: Update translations
v4l2allocator: Use qdata instead of parenting to DmabufMemory

Parenting V4l2Memory to DmabufMemory was in conflict with recent
optimization in DmabufMemory to avoid dup(), and didn't work with
memory sharing. Instead, use a qdata and it's destroy notify.

https://bugzilla.gnome.org/show_bug.cgi?id=730441
Update .po files
Release 1.3.91
v4l2bufferpool: Fix copy threshold implementation

We cannot allocate new buffer in acquire, otherwise the base class
is not aware and get confused. Instead, copy in _process(). This leads
to crash on finalize.

Fixes regression, see https://bugzilla.gnome.org/show_bug.cgi?id=732912
po: update POTFILES

https://bugzilla.gnome.org/show_bug.cgi?id=733208
rtpdtmfmux: Avoid taking an unnecessary ref

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=733122
rgvolume: Avoid taking unnecessary refs

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=733122
aacparse: Properly report in the CAPS query that we can convert ADTS<->RAW

https://bugzilla.gnome.org/show_bug.cgi?id=733190