vtenc: fix compilation on < 10.9
openh264enc: Add new enable-frame-skip property and disable it by default

Otherwise e.g. videotestsrc ! openh264enc ! ... will drop every second frame
because otherwise the target bitrate can't be reached without loosing too
much quality.
tests: add CFLAGS and LADD for glimagesink unit test

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=732694
intervideosrc: Stop showing the current frame after 1 second, not after 30 frames
faad: set channel positions using the appropriate API

https://bugzilla.gnome.org/show_bug.cgi?id=731038
coremediabuffer: set ->pixel_buf for CVPixelBuffer buffers

Fix a bug for which we never actually set ->pixel_buf to non-NULL for
CVPixelBuffer buffers.
vtenc: fix build on iOS
interaudiosink: Make sure to store at least period-time samples at once in the adapter

It's better to create some more silence than having the source pull multiple
short buffers out of the adapter and insert silence between them.
gl/cocoa: Remove GNUStep support

Until gcc and GNUStep properly support Objective-C blocks and other
"new" features of Objective-C we can't properly support them without
making the code much more ugly.

https://bugzilla.gnome.org/show_bug.cgi?id=739152
gl/cocoa: Don't override the application delegate

Otherwise interesting things will happen in Cocoa applications, like
infinite event loops that block the NSApplication loop forever.

This was only needed for GNUStep and thus can safely be removed now.
codecparsers: h264: fix derivation of MaxPicNum variable.

The logic to compute the MaxPicNum variable was reversed. In paricular,
MaxPicNum is double MaxFrameNum only if field_pic_flag is set to 1.

https://bugzilla.gnome.org/show_bug.cgi?id=739291
decklink: Fix indention
dvbbasebin: fix possible crash by passing 64 bits for 64-bit queue property

https://bugzilla.gnome.org/show_bug.cgi?id=740191
gl: Use numeric OSX version instead of the macro

The macro is not defined on older OSX versions and evaluates to 0.

https://bugzilla.gnome.org/show_bug.cgi?id=740201
gl/cocoa: Only use convertRectToBacking on OSX >= 10.7

It does not exist before and older versions also don't have
support for HiDPI displays anyway.

https://bugzilla.gnome.org/show_bug.cgi?id=740201
dvbsrc: drop explicit comparisons against 0 for true/false
opencv-example: Use g_snprintf instead of sprintf

https://bugzilla.gnome.org/show_bug.cgi?id=739846
glmixer: add read-only context property
glfilter: add read-only context property
examples: relicense opencv gsthanddetect_test to LGPLv2+

The GPL3 license header was copy'n'pasted from a
neighbouring source file by mistake, the original
code was not GPL3 licensed, but fell under the
default GStreamer license, which is LGPLv2+.

https://bugzilla.gnome.org/show_bug.cgi?id=685655