MacOSX/Framework/VLCTime.m: Fix a segfault because of a missing retain. Create a real null time. Code simplification.

* add a 'graphite' button set including the facilities to switch the theme at runtime (closes #1379)

MacOSX/Framework/VLCLibrary.m: Default the use of the opengllayer video output module. Don't be verbose by default.

Only the file access uses this, but I don't like "wild" callbacks into plugins.

* adapted the wizard to use the RTP stream out module instead of the removed RTP access out. Please check the other interfaces...

small fix for http-streaming, don't set b_die to true in beginning if
object is alive.

Fix segfault when Connect() returned failure and fix memleaks. Make sure live555 modules exits while in Connect() if vlc is asked to stop.

* revert previous forward-port, as video-device's content changed for 0.9.0. Thanks to Pierre for pointing this out.

video_output/opengllayer.m: Correctly set the initial bounds of the layer. Also grab the anti-tearing stuff from the Mac OS X GL vout.

 * yuy2_i420: convert from Packed YUV 4:2:2 to Planar YUV 4:2:0
 * yuy2_i422: convert from Packed YUV 4:2:2 to Planar YUV 4:2:2
 * chroma_chain: attempt to chain 2 chroma converters to acheive the conversion (i.e. yuy2 -> rv32 will be done using yuy2 -> i420 -> rv32)

 * adjust.c, extract.c: packed YUV 422 support.
 * filter_picture.h: code shared by some "video filter2" filters.
 * erase.c: validate the picture chroma in the constructor.