input: fixed uninitialised variable (i_microsecondperframe for subs)

* Allow to modify subtitle delay on the fly and implement hotkeys 
  (h and j)

* When framerate is available with subrip, use sub-fps to make corrections
  (sub-fps default value is now 0, if left to this value, 25fps will be
   assumed in microdvd mode and no correction will be applied in subrip)

Main problem is that when seeking in the subtitles, you easily get
several of them displayed. Maybe we could add a flag to subpicture_t,
like SUBTITLE_PICTURE to say that only one of them must be displayed at
a time, but that other subpictures (OSD, ...) can remain present on the
screen at the same time.

   + new input_Control() function (doesn't do much for now).
   + started bookmarks support through input_Control().
   + new --bookmarks={name=foo,bytes=foo,time=foo},{...} config option.

* src/video_output/*:
   + started support for embeddable vouts (vout_RequestWindow()/vout_ReleaseWindow())
   + new --video-x/y config options

   + added --meta-title/author/artist/genre/copyright/description/date/url config options.
     This allows the user to specify/override metadata information for an input.

* include/vlc_meta.h:
   + vlc_meta_Merge( dest, src ) helper function.

* modules/demux/mp4/*:
   + Fixed a couple of mem-leaks.
   + Support for "description" metadata.

the maximum speed if the output can control the pace)

 start-time and stop-time (both given in second) ;)
 
 Becarefull that it won't work with all files because of missing/wrong
 media length (ex: ts, broken avi, ...) or the fact that the headers
 will not be read (ex: mpeg1 ps, perhaps ogg, ...)

* ALL: changed the prototype of module_Need() to accept a "strict" boolean argument.
If "strict" is true and a module name is provided then module_Need() will only look for the specified module
If "strict" is false, then module_Need() will first look for the specified module and if it wasn't found, will continue with the other modules with the same "capability".

 without destroying/recreating a new input. (Will be usefull for streaming).
 ( A value of -1 means repeat for ever).
 --> Not tested with dvd.

 auto-detection.

* modules/mux/avi.c, modules/mux/ogg.c: use SetDWLE() from vlc_common.h.
* src/input/input.c: fixed memleak.
* modules/demux/ogg.c: fixed another timing bug.

much memory, and was inconsistent, especially with input_CreateThread
taking an array of options

* Revert to using array of options

* To add an item with options:
    - either use playlist_ItemNew, ItemAddOption, and then AddItem
      (useful if you don't have all your options in an array)
    - either use playlist_AddExt (use this if all your options are
      already in an array)

* To add an item without options: use playlist_Add

You can still add options after an item has been added by using either
playlist_AddOption or playlist_ItemAddOption

* Attempt to improve API and solve thread safety issues.
  - playlist_Item* functions allow to touch items only.
    p_item->lock must be used when needed
    (playlist_ItemNew, playlist_ItemDelete, playlist_Item*Info,
     playlist_ItemSet* )

  - playlist_ItemGetById and ItemGetByPos give you playlist_items
    for GetByPos, you should have the playlist lock

At the moment, the playlist_Set* and playlist_*Info functions are kept (they work with position) but should be avoided.

        export input_CreateThread/input_StopThread/input_DestroyThread.

 implementations, not yet used).

* src/input/*, modules/demux/util/sub.[ch]: cleanup and fixed memory leaks.

* modules/demux/util/*: a bit of cleanup.

* A few coding style fixes
* Doxygenized a few functions

* src/input/input.c: fixed memleaks.
* src/input/input_info.c: small bug fix.
* modules/stream_out/standard.c: fixed memleaks.

 * removed unused variable

* src/playlist/item.c
  src/playlist/info.c
  src/playlist/item-ext.c
  src/playlist/group.c
  src/playlist/sort.c
  src/playlist/loadsave.c
  include/vlc_playlist.h
      - New playlist_info structures and accessors
        It works pretty like the old input_info (with categories)
        It provides modularity to the playlist
      - Removed ppsz_options and i_options from playlist_item
        (we use the special category Options)
      - Added a unique id to each playlist_item to be able to track the
        items accross playlist reorders
      - Simplified adding of items.
           - playlist_AddExt is removed
           - playlist_AddItem is still here and exported but should not be used
           - use playlist_Add( p_playlist, uri, name, duration, mode, pos )
             and use the accessors for all other things
      - Added setters for fields of the playlist_item structure
      - Introduced "item-change" and "playlist-current" playlist variables
        to give more flexibility than only intf-change

      At the moment, duration is still in the structure (easier to use, IMHO)

* src/input/input.c
  src/libvlc.c :
        playlist item options parsing changed

* include/vlc_common.h : added playlist_info structures

 * fill in the duration field of the playlist item when starting playback of
   a file, if the demuxer supports it.

       packetizers running in the input thread. (Usefull with sout)

  CR_AVERAGE #define in input_clock.c (useful for PVR input)
* modules/codec/ffmpeg/encoder.c, modules/stream_out/transcode.c : fixes
  for older version of ffmpeg
* modules/stream_out/transrate/transrate.c : misc optimizations

 demuxer using es_out_* ie everyone but TS and PS).

 implemented.

* src/input/input.c: fixed a whole load of mem leaks when the input is closed before the initialisation is complete (inexistant input, etc...).

 input_EsOutDelete.

* src/input/input.c: oops, set the ES format before selecting it.