chromas converstion: optimize MMX/SSE acceleration even more by leveraging out of order execution, basically avoid CPU stalls by using more registers and by spacing memory fetch and use as much as possible (CPU will run available instructions while waiting for memory fecth to complete)

	Use decoder_GetInputAttachment to get attachment from a decoder module.
    You need to release the memory with vlc_input_attachment_Delete.
	Untested...

modules/playlist/* cosmetic.

- video_chroma: added support for IA-32/64 SSE2 accelaration (128 bit vector integer registers), needs LOADS of testing

Qt4 - SysTrayIcon: change the previous commit after some remarks on IRC and fix the toggle/Show-Hide - bug.

chapter encoding, I fear the worst)

 - time/duration display
 - meta info parsing.
 - seek (precise seek if SEEKTABLE presents)
Resampling can still happen but I think it has to do with the
decoder(at least with our ffmpeg wrapper, I haven't tested the
native one).

(Please report any 'seek' regression)

audio: use avcodec_decode_audio2
       use block_Realloc to pad buffer.
	   fixed decoding when SplitBuffer is used (flac)

        do not convert pts/dts of prerolled samples
decoder: fixed ES_OUT_SET_NEXT_DISPLAY_TIME implementation (improved seek)
         proper handling of DISCONTINUITY
         reset video picture heap on seek/pause/rate change (avoid old
         pictures)
Please report any regression.

(I do not reset timestamp on purpose, it will at least break demuxer using
packetizer)

* Added Loop and Repeat methods in /TrackList
* Added GetMetadata method in /Player
* Fixed "length" metadata item to fit the spec (It should be expressed
        in seconds)

Sharpen performance improvement by precalculating some values. Patch by Jérémy DEMEULE, author of the filter.

* src/input/input.c: don't use input_EsOutDiscontinuity() on pause for now since this isn't properly supported by decoders yet and can thus corrupt the decoded stream.