mpegts: Add parsing for CA descriptor (0x05)

https://bugzilla.gnome.org/show_bug.cgi?id=732986
examples: Add CAT section and CA descriptor support

https://bugzilla.gnome.org/show_bug.cgi?id=732986
po: Update translations
opus: Fix a double-unref in the Opus header code

The headers were never getting reffed when being added to the headers
list, which is later unreffed-and-freed by the caller (e.g.
gst_opus_parse_parse_frame()).

https://bugzilla.gnome.org/show_bug.cgi?id=733013
libs: Don't install headers and pc files for libgstwayland/badvideo/badbase

These will disappear after 1.4.0 and it would be rather annoying if
people started depending on them.

https://bugzilla.gnome.org/show_bug.cgi?id=732207
gl: Move GstGLMixer to the plugin for now

It depends on GstAggregator and we don't want to install headers
for that yet.

https://bugzilla.gnome.org/show_bug.cgi?id=732207
atdec: Change rank to MARGINAL until it can properly handle multichannel audio

https://bugzilla.gnome.org/show_bug.cgi?id=727757
Update .po files
video: Properly include headers in Makefile.am

and don't set noinst_HEADERS twice.
gl: Link to all required libraries but not more
Release 1.3.91
ext: Include winsock.h on Windows when required

https://bugzilla.gnome.org/show_bug.cgi?id=733052
motioncells: Use no network API if not required
curl: Use winsock2 instead and the GLib macro for checking if we're on Windows
gl: Always build gstglmixer, not only when full OpenGL support is enabled
wrappercamerabinsrc: Fix caps filter caps proxying

The notify signal is triggered when caps is changed. But instead of
proxying the fixed caps, we query for the caps. Hence, when we go to
READY state, we endup setting template caps on the proxied caps
filter instead of NULL, which leads to negoitation failure. Correctly
proxy NULL caps if this is the new caps. Fixes not negotiated error
when running in cheese. Also fix a leak of caps string in one of the
trace.

https://bugzilla.gnome.org/show_bug.cgi?id=732741
curlsshsink: Include gst.h and other stuff before anything else