Attempt to implement chroma conversion using swscale. This currently crashes on calling of pf_convert().

 * Metadata box ( 'm' key)
 * Rebuild the playlist immediately after a deletion, avoiding crashes
 * Center the title
 * Correctly ellipsize wide strings

* src/input/clock.c: Feed synchro with new ref. point after unexpected discontinuity. Needs testing, should fix ticket #691 no audio/video in transcode after clock gap in input

modules/codec/ffmpeg/video.c: Fix Remi Duraffort's PIX_FMT_RGBA issue by testing directly for PIX_FMT_RGBA definition, instead of testing if swscale is present.

testapi.c: Superficial media list tests. For some reason `make check` doesn't work on here (Mac OS X) due to some libtool issues, so it wasn't tested for real.

Patch by Richard Hosking: v4l2 minor patch to fix silly bug in handling of user specified caching value.

So far, it should work for most of the streams, except MP3 in rm (silly guys...), ralf, because it is still unsupported, and Sipr because of the flavour detection.

Extra Data code factorisation: This shouldn't destroy old support, but please repport any broken stream.

Contribs: Try to use already compiled binaries made by Trolltech instead of the one I have to make on Windows. Use Wine... Close your eyes, it can burn...

playlist_nodeDump as reference.

 done in libvlc_new now (since r22749)

- waitpid() can fail

Implement clickable osdmenu. The clickable positioning and scaling guessing is not complete (the whole spu region is now clickable with current configurations).