ffmpeg: version bump to 2.3.3

Change-Id: Ie84ed4d0292b11695f3a03685a7fd329ed723051
libbluray: version bump to 0.6.1
makemkv: version bump to 1.8.12
use export_exlib_phases

Change-Id: I4a92fa4acccf9353435af43a51589c6ce12b9804
mpv: Adapt exlib to recent changes in upstream

x11-libs/libXxf86vm was dropped in favor of x11-libs/libXrandr in scm version.
Check for XF86keysym.h was also dropped.

See commits on github for more details:
    fe782a6e957c1f2d472a91eceef01ca5fd6f5cb7
    f8f3a1b4a196cd893abb7e9042f6a5cbea00affa

This is done only so [~scm] can build, and as soon as a new release comes out,
the stupid if/else/fi can be killed.

Change-Id: Ifa38c4af74d09e6ee8f388db7f04121fce3753e3
Add calibre-1.48.0
Initial exheres for meterbridge-0.9.3
gst-plugins-bad: multibuildify

Change-Id: I6d8c6565abef7e66677c5ae01d224c923cf4cda2
gstreamer: bump to 1.4.0

Signed-off-by: Marc-Antoine Perennou <keruspe@exherbo.org>
gst-plugins-base: bump to 1.4.0

Signed-off-by: Marc-Antoine Perennou <keruspe@exherbo.org>
gst-plugins-good: bump to 1.4.0

Signed-off-by: Marc-Antoine Perennou <keruspe@exherbo.org>
gst-libav: bump to 1.4.0

Signed-off-by: Marc-Antoine Perennou <keruspe@exherbo.org>
libwebp: version bump to 0.4.1

+ Downloads location has changed.

Change-Id: Ic1e423860b6982737a77b7ba636dd2ad9aa4a1f8
Generate and install zsh completion.
Rename option.
ffmpeg: version bump to 1.2.8
gst-libav: make system-libav optional

Change-Id: I32206308c83a41dc5b9404b59368a8299bd86126
OpenJPEG: version bump to 1.5.2, fixes multiple CVEs

CVE-2013-4289 CVE-2013-4290 CVE-2013-1447 CVE-2013-6045 CVE-2013-6052 CVE-2013-6054 CVE-2013-6053 CVE-2013-6887
OpenJPEG: version bump to 2.1.0 (masked)
inkscape: version bump to 0.48.5

Change-Id: Ieca8d4b5811580f7a5c98033b07f1a81b7e8c642