Also, make it clearer what is shared and instance-specific

So,
libvlc_t ==> libvlc_global_t
vlc_t ==> libvlc_int_t (internal instance)

p_object->p_libvlc ==> p_object->p_libvlc_globale
p_object->p_vlc ==> p_object->p_libvlc

VLC_OBJECT_VLC ==> VLC_OBJECT_LIBVLC

And by the way, there is some cleanup required :) (ie, some things are created in the global object instead of the instance-specific one)

What is currently broken:
 * Some playlist demuxers (shout, dvb and pls)
 * DAAP
 * BeOS playlist
 * GPE playlist, I suppose

What has some trouble:
 * Meta handling in several demuxers (most notably TS)
 * Skins2 playlist (doesn't refresh correctly)
 * OS X playlist (see bigben's latest commits)

 (in KHz) + fixed the bitrate ("$B") variable to use only the audio bit rate.
* winamp2.xml: updated the winamp2 skin

* Reduce vlc_object_find calls

This one is slightly dangerous as it can happen over and over again during
normal operation.

   processing of SPU elementary streams.

   to select a precise track by its ID.
 * modules/demux/ts.c: Enable --ts-es-id-pid by default since I see no
   drawback to it.

   [12140].

Flagging BLOCK_FLAG_DISCONTINUITY for every PID in the input when the slider is moved on the GUI or a jump in the stream is made. It is also propagated to the mpegvideo packetizer. The packetizer has a new mode to sync on I-frame boundary after such a jump. It avoids sending some broken frames to the client. (Forward port of branches/0.8.1-jpsaman-thedj revision 11067 and 11842.)

(da big courmischage)

 ts.c: use ES_OUT_DEL_GROUP to remove old program.

 * input: allow chaining of access_filter (like filter1:filter2 ...)
 * es_out: support VLC_META_NOW_PLAYING for multi-program stream.

avi.c: make frame rate info available

 * es_out: added ES_OUT_SET_GROUP_META to add on the fly meta for a program
 (it's not yet really clean).
 * demux/ts: parse SI tables of DVB (channel names + events), it needs last
 libdvbpsi svn (set TS_USE_DVB_SI to 1 in modules/demux/ts.c to use it).

Change some message severities